Skip to content
https://nationaltrust.org.uk

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
6
REVIEW
1
PASS
8
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
38
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

4.13 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

8.42 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.02 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

7.81 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

24.49 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 1 REVIEW 6 FIX
F
Page Weight Budget
Action
5.2 MB transferred, 43 requests
FIX
5.2 MB transferred, 43 requests
Critical::
Page weighs 9.2 MB (5.2 MB transferred)
Warning::
Images are 3.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.4 MB
Warning::
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Info::
43 HTTP requests
Info::
Estimated 1.1 g CO2 per page load
5.2 MB / 2.4 MB budget
5.2 MB transferred
43 requests
1.1 g CO2 per page load
Images 3.4 MiB 65%
JavaScript 1.6 MiB 32%
HTML 122.1 KiB 2%
Fonts 58.3 KiB 1%
Other 19.0 KiB 0%
CSS 3.7 KiB 0%
Other 1.2 KiB 0%
Other 905 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (5.2 MiB of 5.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3576ms total JS execution
FIX
3576ms total JS execution
Warning::
https://static.nationaltrust.org.uk/nt-front-end/_...: 950ms CPU time
Warning::
https://static.nationaltrust.org.uk/nt-front-end/_...: 872ms CPU time
Warning::
https://tms.nationaltrust.org.uk/nationaltrust/pro...: 519ms CPU time
Warning::
https://www.nationaltrust.org.uk/: 437ms CPU time
Warning::
https://www.nationaltrust.org.uk/18f5227b-e27b-445...: 343ms CPU time
Warning::
Third-party scripts: 3576ms (100% of total)

Main Thread Breakdown

Script Evaluation 58% Script Parsing & Compilation 14% Other 12% Style & Layout 11%
ScriptTotalScriptingParse/CompileParty
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/_app-d691941104cf4a95.js950ms639ms284ms3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/framework-23ec7355c2fecaf9.js872ms615ms27ms3rd
https://tms.nationaltrust.org.uk/nationaltrust/prod/Bootstrap.js519ms366ms148ms3rd
https://www.nationaltrust.org.uk/437ms15ms2ms3rd
https://www.nationaltrust.org.uk/18f5227b-e27b-445a-a53f-f845fbe69b40/stormcaster.js343ms261ms31ms3rd
Unattributable258ms7ms0ms3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/main-06232a913dd19e0d.js114ms95ms16ms3rd
https://static.nationaltrust.org.uk/js/website-cookie-preferences-vue/nt-cookie-form.full.min.js83ms56ms10ms3rd
F
JS Bundles
Action
14 scripts, 770 KB unused
FIX
14 scripts, 770 KB unused
Warning::
https://static.nationaltrust.org.uk/nt-front-end/_...: 569 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://tms.nationaltrust.org.uk/nationaltrust/pro...: 95 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.nationaltrust.org.uk/nt-front-end/_...: 44 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.nationaltrust.org.uk/18f5227b-e27b-445...: 40 KB unused (24%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.nationaltrust.org.uk/nt-front-end/_...: 21 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 770 KB
770 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/_app-d691941104cf4a95.js1217 KB569 KB (47%)✓3rd
https://tms.nationaltrust.org.uk/nationaltrust/prod/Bootstrap.js130 KB95 KB (74%)✓3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/framework-23ec7355c2fecaf9.js88 KB44 KB (51%)✓3rd
https://www.nationaltrust.org.uk/18f5227b-e27b-445a-a53f-f845fbe69b40/stormcaster.js165 KB40 KB (24%)✓3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/main-06232a913dd19e0d.js44 KB21 KB (49%)✓3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/webpack-6a6d4e7fd05f0de6.js2 KB—✓3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/%5B%5B...route%5D%5D-0873afd79e1ed6fc.js1 KB—✓3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_buildManifest.js1 KB—✓3rd
https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_ssgManifest.js0 KB—✓3rd
https://static.nationaltrust.org.uk/js/website-cookie-preferences-vue/nt-cookie-form.full.min.js37 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
43 resources · 5.2 MB · 770 KB savings available
FIX
43 resources · 5.2 MB · 770 KB savings available
Warning::
Page weight 4.2 MB over 1MB target
Got: 5.2 MB Expected: ≤ 1 MB
Info::
~770 KB of savings available
Warning::
42 third-party resources (100% of weight)
Info::
9 resources over 200KB
43 resources · 5.2 MiB · 42 third-party 4.2 MiB over 1MB target
Image 65% · 3.4 MiB
JavaScript 32% · 1.6 MiB
Document 2% · 122.1 KiB
Font 1% · 58.3 KiB
CSS 0% · 3.7 KiB
Other 0% · 2.2 KiB

~769.6 KiB of savings available

Remove unused JavaScript: 769.6 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
21 images, 0 KB saveable
PASS
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 3.4 MB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (58 KB)
PASS
1 fonts (58 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

58 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 4.1 s LCP 8.4 shttps://static.nationaltrust.org.uk/nt-front-end/fonts/nationaltrusttt-regular.woff2nationaltrusttt-regular... https://static.nationaltrust.org.uk/nt-front-end/fonts/nationaltrusttt-regular.woff2 — 58.3 KiB — 17 ms — font-display: swap
nationaltrusttt-regular... woff2 swap
Size 58 KB
Load time 17 ms
Start 945 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
43 requests over 3461ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 4.1 s LCP 8.4 shttps://nationaltrust.org.uk// https://nationaltrust.org.uk/ — 301 — 98 B — 109 ms — http/1.1https://www.nationaltrust.org.uk/www.nationaltrust.org.uk/ https://www.nationaltrust.org.uk/ — 200 — 122.1 KiB — 550 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/css/5232d501b0fab919.cssstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/css/5232d501b0fab919.css — 200 — 3.7 KiB — 16 ms — h2https://tms.nationaltrust.org.uk/nationaltrust/prod/Bootstrap.jstms.nationaltrust.org.uk/nationaltr... https://tms.nationaltrust.org.uk/nationaltrust/prod/Bootstrap.js — 200 — 129.7 KiB — 268 ms — h2https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/resized/nt22f5hm-blossom-weekend-at-ardress-house-county-armagh-northern-ireland.jpg?auto=webp&width=767&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/resized/nt22f5hm-blossom-weekend-at-ardress-house-county-armagh-northern-ireland.jpg?auto=webp&width=767&crop=16:9&dpr=2 — 200 — 262.8 KiB — 33 ms — http/1.1https://www.nationaltrust.org.uk/site.webmanifestwww.nationaltrust.org.uk/site.webma... https://www.nationaltrust.org.uk/site.webmanifest — 200 — 1.2 KiB — 493 ms — h2https://static.nationaltrust.org.uk/js/website-cookie-preferences-vue/nt-cookie-form.full.min.jsstatic.nationaltrust.org.uk/js/webs... https://static.nationaltrust.org.uk/js/website-cookie-preferences-vue/nt-cookie-form.full.min.js — 200 — 37.1 KiB — 5 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/webpack-6a6d4e7fd05f0de6.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/webpack-6a6d4e7fd05f0de6.js — 200 — 2.4 KiB — 5 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/framework-23ec7355c2fecaf9.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/framework-23ec7355c2fecaf9.js — 200 — 87.6 KiB — 39 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/main-06232a913dd19e0d.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/main-06232a913dd19e0d.js — 200 — 44.0 KiB — 18 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/_app-d691941104cf4a95.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/_app-d691941104cf4a95.js — 200 — 1.2 MiB — 57 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/%5B%5B...route%5D%5D-0873afd79e1ed6fc.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/%5B%5B...route%5D%5D-0873afd79e1ed6fc.js — 200 — 1.0 KiB — 8 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_buildManifest.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_buildManifest.js — 200 — 1.0 KiB — 10 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_ssgManifest.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_ssgManifest.js — 200 — 463 B — 9 ms — h2https://www.nationaltrust.org.uk/18f5227b-e27b-445a-a53f-f845fbe69b40/stormcaster.jswww.nationaltrust.org.uk/18f5227b-e... https://www.nationaltrust.org.uk/18f5227b-e27b-445a-a53f-f845fbe69b40/stormcaster.js — 200 — 164.6 KiB — 65 ms — h2https://static.nationaltrust.org.uk/nt-front-end/fonts/nationaltrusttt-regular.woff2static.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/fonts/nationaltrusttt-regular.woff2 — 200 — 58.3 KiB — 17 ms — h2https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/cornwall/places/penrose/library/winter/litter-clean-beach-penrose-cornwall-nt22dtd1.jpg?auto=webp&width=767&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/cornwall/places/penrose/library/winter/litter-clean-beach-penrose-cornwall-nt22dtd1.jpg?auto=webp&width=767&crop=16:9&dpr=2 — 200 — 176.9 KiB — 28 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/food-recipes/smoked-mackerel-fishcake-roll.jpg?auto=webp&width=767&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/food-recipes/smoked-mackerel-fishcake-roll.jpg?auto=webp&width=767&crop=16:9&dpr=2 — 200 — 88.2 KiB — 19 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/essex-bedfordshire-hertfordshire/places/paycockes-house-and-garden/library/visitor-in-the-bedroom-at-paycockes-house-and-garden-essex.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/essex-bedfordshire-hertfordshire/places/paycockes-house-and-garden/library/visitor-in-the-bedroom-at-paycockes-house-and-garden-essex.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 175.2 KiB — 32 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/dog-friendly/dog-walkers-in-bluebells-hatchlands-park-surrey-1333120.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/dog-friendly/dog-walkers-in-bluebells-hatchlands-park-surrey-1333120.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 468.1 KiB — 66 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/knole/library/winter/family-walk-knole-kent-1459022.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/knole/library/winter/family-walk-knole-kent-1459022.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 293.5 KiB — 30 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/whats-on/city-blossom-experiences-image-1-2026.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/whats-on/city-blossom-experiences-image-1-2026.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 112.6 KiB — 293 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/yorkshire/places/beningbrough/library/spring/visitor-photographing-blossom-at-beningbrough-hall-north-yorkshire-1621299.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/yorkshire/places/beningbrough/library/spring/visitor-photographing-blossom-at-beningbrough-hall-north-yorkshire-1621299.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 162.8 KiB — 21 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/north-east/places/cragside/library/cragside-drawing-room-northumberland.-1617648.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/north-east/places/cragside/library/cragside-drawing-room-northumberland.-1617648.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 137.0 KiB — 16 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/surrey/places/hatchlands-park/library/spring/visitors-bluebell-woodland-hatchlands-park-surrey-1333128.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/surrey/places/hatchlands-park/library/spring/visitors-bluebell-woodland-hatchlands-park-surrey-1333128.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 253.9 KiB — 36 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/gardening-tips/secret-garden-bristol-bbc-06.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/gardening-tips/secret-garden-bristol-bbc-06.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 236.5 KiB — 8 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/scotney-castle/library/spring/spring-scotney-castle-kent-134032.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/scotney-castle/library/spring/spring-scotney-castle-kent-134032.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 269.7 KiB — 24 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/london/places/ham-house-and-garden/library/built-heritage-history-and-collections/family-visiting-ham-house-and-garden-london-1183150.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/london/places/ham-house-and-garden/library/built-heritage-history-and-collections/family-visiting-ham-house-and-garden-london-1183150.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 209.2 KiB — 22 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/1577027-blossom-at-stowe-buckinghamshire.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/1577027-blossom-at-stowe-buckinghamshire.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 46.0 KiB — 7 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/wiltshire/places/stourhead/library/earthworks-whitesheet-hill-wiltshire-1578393.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/wiltshire/places/stourhead/library/earthworks-whitesheet-hill-wiltshire-1578393.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 176.5 KiB — 19 ms — http/1.1
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 4.1 s LCP 8.4 shttps://nationaltrust.org.uk// https://nationaltrust.org.uk/ — 301 — 98 B — 109 ms — http/1.1https://www.nationaltrust.org.uk/www.nationaltrust.org.uk/ https://www.nationaltrust.org.uk/ — 200 — 122.1 KiB — 550 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/css/5232d501b0fab919.cssstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/css/5232d501b0fab919.css — 200 — 3.7 KiB — 16 ms — h2https://tms.nationaltrust.org.uk/nationaltrust/prod/Bootstrap.jstms.nationaltrust.org.uk/nationaltr... https://tms.nationaltrust.org.uk/nationaltrust/prod/Bootstrap.js — 200 — 129.7 KiB — 268 ms — h2https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/resized/nt22f5hm-blossom-weekend-at-ardress-house-county-armagh-northern-ireland.jpg?auto=webp&width=767&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/resized/nt22f5hm-blossom-weekend-at-ardress-house-county-armagh-northern-ireland.jpg?auto=webp&width=767&crop=16:9&dpr=2 — 200 — 262.8 KiB — 33 ms — http/1.1https://www.nationaltrust.org.uk/site.webmanifestwww.nationaltrust.org.uk/site.webma... https://www.nationaltrust.org.uk/site.webmanifest — 200 — 1.2 KiB — 493 ms — h2https://static.nationaltrust.org.uk/js/website-cookie-preferences-vue/nt-cookie-form.full.min.jsstatic.nationaltrust.org.uk/js/webs... https://static.nationaltrust.org.uk/js/website-cookie-preferences-vue/nt-cookie-form.full.min.js — 200 — 37.1 KiB — 5 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/webpack-6a6d4e7fd05f0de6.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/webpack-6a6d4e7fd05f0de6.js — 200 — 2.4 KiB — 5 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/framework-23ec7355c2fecaf9.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/framework-23ec7355c2fecaf9.js — 200 — 87.6 KiB — 39 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/main-06232a913dd19e0d.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/main-06232a913dd19e0d.js — 200 — 44.0 KiB — 18 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/_app-d691941104cf4a95.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/_app-d691941104cf4a95.js — 200 — 1.2 MiB — 57 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/%5B%5B...route%5D%5D-0873afd79e1ed6fc.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/%5B%5B...route%5D%5D-0873afd79e1ed6fc.js — 200 — 1.0 KiB — 8 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_buildManifest.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_buildManifest.js — 200 — 1.0 KiB — 10 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_ssgManifest.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/bAfU8_wwySvyTYv782_ii/_ssgManifest.js — 200 — 463 B — 9 ms — h2https://www.nationaltrust.org.uk/18f5227b-e27b-445a-a53f-f845fbe69b40/stormcaster.jswww.nationaltrust.org.uk/18f5227b-e... https://www.nationaltrust.org.uk/18f5227b-e27b-445a-a53f-f845fbe69b40/stormcaster.js — 200 — 164.6 KiB — 65 ms — h2https://static.nationaltrust.org.uk/nt-front-end/fonts/nationaltrusttt-regular.woff2static.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/fonts/nationaltrusttt-regular.woff2 — 200 — 58.3 KiB — 17 ms — h2https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/cornwall/places/penrose/library/winter/litter-clean-beach-penrose-cornwall-nt22dtd1.jpg?auto=webp&width=767&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/cornwall/places/penrose/library/winter/litter-clean-beach-penrose-cornwall-nt22dtd1.jpg?auto=webp&width=767&crop=16:9&dpr=2 — 200 — 176.9 KiB — 28 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/food-recipes/smoked-mackerel-fishcake-roll.jpg?auto=webp&width=767&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/food-recipes/smoked-mackerel-fishcake-roll.jpg?auto=webp&width=767&crop=16:9&dpr=2 — 200 — 88.2 KiB — 19 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/essex-bedfordshire-hertfordshire/places/paycockes-house-and-garden/library/visitor-in-the-bedroom-at-paycockes-house-and-garden-essex.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/essex-bedfordshire-hertfordshire/places/paycockes-house-and-garden/library/visitor-in-the-bedroom-at-paycockes-house-and-garden-essex.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 175.2 KiB — 32 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/dog-friendly/dog-walkers-in-bluebells-hatchlands-park-surrey-1333120.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/dog-friendly/dog-walkers-in-bluebells-hatchlands-park-surrey-1333120.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 468.1 KiB — 66 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/knole/library/winter/family-walk-knole-kent-1459022.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/knole/library/winter/family-walk-knole-kent-1459022.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 293.5 KiB — 30 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/whats-on/city-blossom-experiences-image-1-2026.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/visit/whats-on/city-blossom-experiences-image-1-2026.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 112.6 KiB — 293 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/yorkshire/places/beningbrough/library/spring/visitor-photographing-blossom-at-beningbrough-hall-north-yorkshire-1621299.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/yorkshire/places/beningbrough/library/spring/visitor-photographing-blossom-at-beningbrough-hall-north-yorkshire-1621299.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 162.8 KiB — 21 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/north-east/places/cragside/library/cragside-drawing-room-northumberland.-1617648.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/north-east/places/cragside/library/cragside-drawing-room-northumberland.-1617648.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 137.0 KiB — 16 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/surrey/places/hatchlands-park/library/spring/visitors-bluebell-woodland-hatchlands-park-surrey-1333128.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/surrey/places/hatchlands-park/library/spring/visitors-bluebell-woodland-hatchlands-park-surrey-1333128.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 253.9 KiB — 36 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/gardening-tips/secret-garden-bristol-bbc-06.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/gardening-tips/secret-garden-bristol-bbc-06.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 236.5 KiB — 8 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/scotney-castle/library/spring/spring-scotney-castle-kent-134032.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/kent/places/scotney-castle/library/spring/spring-scotney-castle-kent-134032.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 269.7 KiB — 24 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/london/places/ham-house-and-garden/library/built-heritage-history-and-collections/family-visiting-ham-house-and-garden-london-1183150.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/london/places/ham-house-and-garden/library/built-heritage-history-and-collections/family-visiting-ham-house-and-garden-london-1183150.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 209.2 KiB — 22 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/1577027-blossom-at-stowe-buckinghamshire.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/blossom-watch/1577027-blossom-at-stowe-buckinghamshire.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 46.0 KiB — 7 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/wiltshire/places/stourhead/library/earthworks-whitesheet-hill-wiltshire-1578393.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/wiltshire/places/stourhead/library/earthworks-whitesheet-hill-wiltshire-1578393.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 176.5 KiB — 19 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/bath-bristol/places/dyrham-park/library/built-heritage-history-and-collections/postcard-children-maypole-dancing-dyrham-gloucestershire-512138.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/regions/bath-bristol/places/dyrham-park/library/built-heritage-history-and-collections/postcard-children-maypole-dancing-dyrham-gloucestershire-512138.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 75.4 KiB — 323 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/food-recipes/honey-and-apple-scone-recipe.jpg?auto=webp&width=505&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/discover-and-learn/food-recipes/honey-and-apple-scone-recipe.jpg?auto=webp&width=505&crop=16:9&dpr=2 — 200 — 73.0 KiB — 3 ms — http/1.1https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/nature-future/nature-future_hp_carousel_2880.jpg?auto=webp&width=733&crop=16:9&dpr=2nt.global.ssl.fastly.net/binaries/c... https://nt.global.ssl.fastly.net/binaries/content/gallery/website/national/library/campaigns/nature-future/nature-future_hp_carousel_2880.jpg?auto=webp&width=733&crop=16:9&dpr=2 — 200 — 239.3 KiB — 324 ms — http/1.1https://tms.nationaltrust.org.uk/privacy/v1/b/b.rnc?n=0&c=1182&i=64jqpt&p=prod&s=349&d=8EZ7InZlcnNpb24iOiIxLjAuMCIsImdhdGV3YXkiOiIyLjMuODAyIiwiY2xpZW50SWQiOjExODIsInB1Ymxpc2hQYXRoIjoicHJvZCIsImluc3RhbmNlJwDwFCI2NGpxcHQiLCJwYWNrZXQiOjAsIm1vZGUiOiJlbmZvcmNlVwDwEW9va2llcyI6e30sImVudmlyb25tZW50IjoiRGVmYXVsQQBAZG9jdRUA8hRSZWZlcnJlciI6IiIsInJlcXVlc3RzIjpbeyJkZXN0aW5hdMkAYCIsInR5cGoA8A9iaWxsaW5nIiwic3RhcnQiOjE3NzY4MTQxNzYyNTBzAKBkIjotMSwic291kgABWgBkc3RhdHVzZgBAYXNvbmUA1F0sImRhdGFQYXR0ZXISALBsaXN0IjpbXSwiaRsB8AA3NzY4MTQxNzYyNTB9XX0tms.nationaltrust.org.uk/privacy/v1... https://tms.nationaltrust.org.uk/privacy/v1/b/b.rnc?n=0&c=1182&i=64jqpt&p=prod&s=349&d=8EZ7InZlcnNpb24iOiIxLjAuMCIsImdhdGV3YXkiOiIyLjMuODAyIiwiY2xpZW50SWQiOjExODIsInB1Ymxpc2hQYXRoIjoicHJvZCIsImluc3RhbmNlJwDwFCI2NGpxcHQiLCJwYWNrZXQiOjAsIm1vZGUiOiJlbmZvcmNlVwDwEW9va2llcyI6e30sImVudmlyb25tZW50IjoiRGVmYXVsQQBAZG9jdRUA8hRSZWZlcnJlciI6IiIsInJlcXVlc3RzIjpbeyJkZXN0aW5hdMkAYCIsInR5cGoA8A9iaWxsaW5nIiwic3RhcnQiOjE3NzY4MTQxNzYyNTBzAKBkIjotMSwic291kgABWgBkc3RhdHVzZgBAYXNvbmUA1F0sImRhdGFQYXR0ZXISALBsaXN0IjpbXSwiaRsB8AA3NzY4MTQxNzYyNTB9XX0 — 204 — 106 B — 34 ms — h2https://www.nationaltrust.org.uk/c99a4269-161c-4242-a3f0-28d44fa6ce24?www.nationaltrust.org.uk/c99a4269-1... https://www.nationaltrust.org.uk/c99a4269-161c-4242-a3f0-28d44fa6ce24? — 200 — 498 B — 48 ms — h2https://www.nationaltrust.org.uk/c99a4269-161c-4242-a3f0-28d44fa6ce24?www.nationaltrust.org.uk/c99a4269-1... https://www.nationaltrust.org.uk/c99a4269-161c-4242-a3f0-28d44fa6ce24? — 200 — 407 B — 50 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/site-search-0528cea30a3fa991.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/site-search-0528cea30a3fa991.js — 200 — 2.5 KiB — 6 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/search-18686a3a05bedeb2.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/search-18686a3a05bedeb2.js — 200 — 1.3 KiB — 6 ms — h2https://static.nationaltrust.org.uk/nt-front-end/images/favicon.icostatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/images/favicon.ico — 200 — 15.1 KiB — 5 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/search-18686a3a05bedeb2.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/search-18686a3a05bedeb2.js — 200 — 0 B — 2 ms — h2https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/site-search-0528cea30a3fa991.jsstatic.nationaltrust.org.uk/nt-fron... https://static.nationaltrust.org.uk/nt-front-end/_next/static/chunks/pages/site-search-0528cea30a3fa991.js — 200 — 0 B — 1 ms — h2https://tms.nationaltrust.org.uk/privacy/v1/b/b.rnc?n=1&c=1182&i=64jqpt&p=prod&s=15511&d=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_YXV0bz13ZWJwJndpZHRoPTc2NyZjcm9wPTE2OjkmZHByPTIlMjAyeKYBbmltZyIsIqMBLTY5owFVOTI1LCKjATFtdXRIAqJPYnNlcnZlckNMSAACnwEwbG9hrwEPnAEdrzY5OTc4NzAyMzCcAf8KLzgxnAEAHzacAVUvNDKcAQcAnwMvaWNNBAMkanMlAyEtY7kE9AQtcHJlZmVyZW5jZXMtdnVlL250GgDfZm9ybS5mdWxsLm1pblYEFh4wFwEvNDIXAU6PMTI5MjM1NjZPBAgPFwEJ8gRudC1mcm9udC1lbmQvX25leHQvLwBhL2NodW5rNQEABQb_Ai02YTZkNGU3ZmQwNWYwZGU2FwEWHzMXAQAPLgJPnzU0OTk0NDgyOS4CIw8XAQ7_C2ZyYW1ld29yay0yM2VjNzM1NWMyZmVjYWY5GQEpLzUzMAJNnzU3Mzc4Njc1ORkBRf8GbWFpbi0wNjIzMmE5MTNkZDE5ZTBkFAEpAG8ED_cFS683ODk4MTA2NDg0LQIHD6UIBgbMBgPrCAKIBglzCEw2MTUyBgMCFAAF2QDyAFJFUVVFU1RfTUFOQUdFUkUAAs0GD2wIJ582NDg3MzYxMjQdBEX_DHBhZ2VzL19hcHAtZDY5MTk0MTEwNGNmNGE5NfMBJz82MjEgBE5vNTE2MTc3BwNIAhoB_xYlNUIlNUIuLi5yb3V0ZSU1RCU1RC0wODczYWZkNzllMWVkNmZjKgEpLzQ5MQRPjzE1ODQzOTA2HQMHAjIGD3gHAw9KBQf_FWJBZlU4X3d3eVN2eVRZdjc4Ml9paS9fYnVpbGRNYW5pZmVzdBwBFh00YAM_MjUwHAFOjzI0OTYwNjc5HAFVP3NzZxoBk684Mjg2ODgwNzIzNgIHD1MFBvYWYzk5YTQyNjktMTYxYy00MjQyLWEzZjAtMjhkNDRmYTZjZTI0P3gFMnhoci8FCnQFPTMwNhQCARQABXQFP1hIUnAFPJ8xOTQ3MDIyNDf2AP8XD-QPV082MzA3EQRND90PXPAZZGlzY292ZXItYW5kLWxlYXJuL2Zvb2QtcmVjaXBlcy9zbW9rZWQtbcUR_wJyZWwtZmlzaGNha2Utcm9sbLIPPB03_ww_NjMwngZOrzYzODQ0NzUwMThyAwcPThE4D3EBeQDKEyJlblUSAtoSD3EBWQ8jEUxgcmVnaW9u6BL1BnJud2FsbC9wbGFjZXMvcGVucm9zZd8SkHdpbnRlci9saXQT0y1jbGVhbi1iZWFjaC0qADItY29CABAt6hJPZHRkMfgCPA6qEj82MzF6CE6fNzU0NDU4MDY5YAcID_gCMA-HAZcPDgMBD4cBVh83HQsJD4cBOBBr8xUDCgNNa25vbAgDwWZhbWlseS13YWxrLSEAEC0zAI8tMTQ1OTAyMvoCAz8zMyakFSMdNwgUTzYzMTFjB02fNzYyODk0OTIwCBQID3MBxh04TRMPcwFZHzEgEQgPcwE4AVsYVC1lYXN09gV2Y3JhZ3NpZO8CBBEA0i1kcmF3aW5nLXJvb22UGFF1bWJlcpIYAD8MTzc2NDj3AgI_NTA19wIlD1cMAA_3AlCPMTM0NTk3OTJrDggPhAHXDwgDZAOEAR8zdQdT9Qhlc3NleC1iZWRmb3Jkc2hpcmUtaGVydA4ABB4DhHBheWNvY2tlqRsADQxlZ2FyZGVuJwngdmlzaXRvci1pbi10aGVUAAExAz9hdC09AAcRLYAADz0DAh83NAYnDyYMAA89A0-fNjU4MTk0MjQ3wQRTATkBAGUBBasBD7kBrw9gCQIP7QdOBLkBHzj2BFNBeW9ya2kDBFsDxWJlbmluZ2Jyb3VnaE0DdHNwcmluZy9UA6BwaG90b2dyYXBoiQYERx84YXQtPQBSLWhhbGyhBhUtZgCPLTE2MjEyOTlkAwIPoQYoDmwYD5gJUJ81MzEzNzAyMDerAf8aD8gGYwSrAR84pxQID0wIMASDIg81EQACnwYAMAPCdGlwcy9zZWNyZXQtFgD_AC1icmlzdG9sLWJiYy0wNh0DAg-BBigPvgljnzk3OTk0NjU2NacSZQJcAQ9yAWEuODWHFw_zB08TN3IBD_MHTATkAg9nJQV1MTU3NzAyN14l8QRhdC1zdG93ZS1idWNraW5naGFtcQYP5gICDwMGKA3iJg8oDlKPNzk1MjY4NDY_JWsPdAFkHzhaBGMEdAEPARdTAfUI0S9kb2ctZnJpZW5kbHkNAABxEjBlcnNgDLBibHVlYmVsbHMtaGkoAIoP_wZzLXBhcmstc3VycmV5LTEzMzMxMjDyAgIP2AUoD40SAQ9OI06PNzI4NzY0OTPyAlQPfgGGD8gIAg9-AVYfNwsUUwLAAgQbDAveAg8eDAQkcy0QA1Atd29vZA4DDxgDCw-uElIPSStOMDUxMKEYHzMZIQkPYgowBJ8YD5oBoh44syIvMzGaAVUvNDALEVNBd2lsdOEIBDcDlXN0b3VyaGVhZDEDUGVhcnRoSin1A3Mtd2hpdGVzaGVldC1oaWxsLT4Ajy0xNTc4MzkzNQYCDycJPA-DAU6PODQ5NzgzMDZPF1QFRQEPgwGCDzYJAg-DAVYfMjoGUwCFGwV-AXBjb3RuZXktszIHwRsDVRICBwApLXMlAAPFG08zNDAzxBs-HzedDQAPfwFOjzc5NzQyNzE0tS4JDx8GOA9_AYcPHA8CD38BVw8ELggPfwE4ZGxvbmRvbgADM2hhbVE0M2FuZPMRBQwGAPwpEHQtF3BpdGFnZS1oCRIhcnnfJGBjb2xsZWM7NiNzL-ceAQ8LANMQD1QAARItdwB_LTExODMxNW8MPg84AwEPtixOjzY0MzUyOTQ4twRUAkIBD7kBuw9wBgIPuQFWHzOJLwgPcgMwBI4SD3IVAAkYKCBob4IGAIADUGFwcGxlbwYjbmU2KA9jCT0fOWEGAA9wAU6fNDcxNjk1NDc1jRhLD3ABgB84mQRi0DQ3MTY5NTQ3NjR9XX0tms.nationaltrust.org.uk/privacy/v1... https://tms.nationaltrust.org.uk/privacy/v1/b/b.rnc?n=1&c=1182&i=64jqpt&p=prod&s=15511&d=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_YXV0bz13ZWJwJndpZHRoPTc2NyZjcm9wPTE2OjkmZHByPTIlMjAyeKYBbmltZyIsIqMBLTY5owFVOTI1LCKjATFtdXRIAqJPYnNlcnZlckNMSAACnwEwbG9hrwEPnAEdrzY5OTc4NzAyMzCcAf8KLzgxnAEAHzacAVUvNDKcAQcAnwMvaWNNBAMkanMlAyEtY7kE9AQtcHJlZmVyZW5jZXMtdnVlL250GgDfZm9ybS5mdWxsLm1pblYEFh4wFwEvNDIXAU6PMTI5MjM1NjZPBAgPFwEJ8gRudC1mcm9udC1lbmQvX25leHQvLwBhL2NodW5rNQEABQb_Ai02YTZkNGU3ZmQwNWYwZGU2FwEWHzMXAQAPLgJPnzU0OTk0NDgyOS4CIw8XAQ7_C2ZyYW1ld29yay0yM2VjNzM1NWMyZmVjYWY5GQEpLzUzMAJNnzU3Mzc4Njc1ORkBRf8GbWFpbi0wNjIzMmE5MTNkZDE5ZTBkFAEpAG8ED_cFS683ODk4MTA2NDg0LQIHD6UIBgbMBgPrCAKIBglzCEw2MTUyBgMCFAAF2QDyAFJFUVVFU1RfTUFOQUdFUkUAAs0GD2wIJ582NDg3MzYxMjQdBEX_DHBhZ2VzL19hcHAtZDY5MTk0MTEwNGNmNGE5NfMBJz82MjEgBE5vNTE2MTc3BwNIAhoB_xYlNUIlNUIuLi5yb3V0ZSU1RCU1RC0wODczYWZkNzllMWVkNmZjKgEpLzQ5MQRPjzE1ODQzOTA2HQMHAjIGD3gHAw9KBQf_FWJBZlU4X3d3eVN2eVRZdjc4Ml9paS9fYnVpbGRNYW5pZmVzdBwBFh00YAM_MjUwHAFOjzI0OTYwNjc5HAFVP3NzZxoBk684Mjg2ODgwNzIzNgIHD1MFBvYWYzk5YTQyNjktMTYxYy00MjQyLWEzZjAtMjhkNDRmYTZjZTI0P3gFMnhoci8FCnQFPTMwNhQCARQABXQFP1hIUnAFPJ8xOTQ3MDIyNDf2AP8XD-QPV082MzA3EQRND90PXPAZZGlzY292ZXItYW5kLWxlYXJuL2Zvb2QtcmVjaXBlcy9zbW9rZWQtbcUR_wJyZWwtZmlzaGNha2Utcm9sbLIPPB03_ww_NjMwngZOrzYzODQ0NzUwMThyAwcPThE4D3EBeQDKEyJlblUSAtoSD3EBWQ8jEUxgcmVnaW9u6BL1BnJud2FsbC9wbGFjZXMvcGVucm9zZd8SkHdpbnRlci9saXQT0y1jbGVhbi1iZWFjaC0qADItY29CABAt6hJPZHRkMfgCPA6qEj82MzF6CE6fNzU0NDU4MDY5YAcID_gCMA-HAZcPDgMBD4cBVh83HQsJD4cBOBBr8xUDCgNNa25vbAgDwWZhbWlseS13YWxrLSEAEC0zAI8tMTQ1OTAyMvoCAz8zMyakFSMdNwgUTzYzMTFjB02fNzYyODk0OTIwCBQID3MBxh04TRMPcwFZHzEgEQgPcwE4AVsYVC1lYXN09gV2Y3JhZ3NpZO8CBBEA0i1kcmF3aW5nLXJvb22UGFF1bWJlcpIYAD8MTzc2NDj3AgI_NTA19wIlD1cMAA_3AlCPMTM0NTk3OTJrDggPhAHXDwgDZAOEAR8zdQdT9Qhlc3NleC1iZWRmb3Jkc2hpcmUtaGVydA4ABB4DhHBheWNvY2tlqRsADQxlZ2FyZGVuJwngdmlzaXRvci1pbi10aGVUAAExAz9hdC09AAcRLYAADz0DAh83NAYnDyYMAA89A0-fNjU4MTk0MjQ3wQRTATkBAGUBBasBD7kBrw9gCQIP7QdOBLkBHzj2BFNBeW9ya2kDBFsDxWJlbmluZ2Jyb3VnaE0DdHNwcmluZy9UA6BwaG90b2dyYXBoiQYERx84YXQtPQBSLWhhbGyhBhUtZgCPLTE2MjEyOTlkAwIPoQYoDmwYD5gJUJ81MzEzNzAyMDerAf8aD8gGYwSrAR84pxQID0wIMASDIg81EQACnwYAMAPCdGlwcy9zZWNyZXQtFgD_AC1icmlzdG9sLWJiYy0wNh0DAg-BBigPvgljnzk3OTk0NjU2NacSZQJcAQ9yAWEuODWHFw_zB08TN3IBD_MHTATkAg9nJQV1MTU3NzAyN14l8QRhdC1zdG93ZS1idWNraW5naGFtcQYP5gICDwMGKA3iJg8oDlKPNzk1MjY4NDY_JWsPdAFkHzhaBGMEdAEPARdTAfUI0S9kb2ctZnJpZW5kbHkNAABxEjBlcnNgDLBibHVlYmVsbHMtaGkoAIoP_wZzLXBhcmstc3VycmV5LTEzMzMxMjDyAgIP2AUoD40SAQ9OI06PNzI4NzY0OTPyAlQPfgGGD8gIAg9-AVYfNwsUUwLAAgQbDAveAg8eDAQkcy0QA1Atd29vZA4DDxgDCw-uElIPSStOMDUxMKEYHzMZIQkPYgowBJ8YD5oBoh44syIvMzGaAVUvNDALEVNBd2lsdOEIBDcDlXN0b3VyaGVhZDEDUGVhcnRoSin1A3Mtd2hpdGVzaGVldC1oaWxsLT4Ajy0xNTc4MzkzNQYCDycJPA-DAU6PODQ5NzgzMDZPF1QFRQEPgwGCDzYJAg-DAVYfMjoGUwCFGwV-AXBjb3RuZXktszIHwRsDVRICBwApLXMlAAPFG08zNDAzxBs-HzedDQAPfwFOjzc5NzQyNzE0tS4JDx8GOA9_AYcPHA8CD38BVw8ELggPfwE4ZGxvbmRvbgADM2hhbVE0M2FuZPMRBQwGAPwpEHQtF3BpdGFnZS1oCRIhcnnfJGBjb2xsZWM7NiNzL-ceAQ8LANMQD1QAARItdwB_LTExODMxNW8MPg84AwEPtixOjzY0MzUyOTQ4twRUAkIBD7kBuw9wBgIPuQFWHzOJLwgPcgMwBI4SD3IVAAkYKCBob4IGAIADUGFwcGxlbwYjbmU2KA9jCT0fOWEGAA9wAU6fNDcxNjk1NDc1jRhLD3ABgB84mQRi0DQ3MTY5NTQ3NjR9XX0 — 204 — 106 B — 42 ms — h2https://tms.nationaltrust.org.uk/privacy/v1/b/b.rnc?n=2&c=1182&i=64jqpt&p=prod&s=5194&d=8EZ7InZlcnNpb24iOiIxLjAuMCIsImdhdGV3YXkiOiIyLjMuODAyIiwiY2xpZW50SWQiOjExODIsInB1Ymxpc2hQYXRoIjoicHJvZCIsImluc3RhbmNlJwDwFCI2NGpxcHQiLCJwYWNrZXQiOjEsIm1vZGUiOiJlbmZvcmNlVwDwEW9va2llcyI6e30sImVudmlyb25tZW50IjoiRGVmYXVsQQDyBnJlcXVlc3RzIjpbeyJkZXN0aW5hdLMA8TRodHRwczovL250Lmdsb2JhbC5zc2wuZmFzdGx5Lm5ldC9iaW5hcmllcy9jb250ZW50L2dhbGxlcnkvd2Vic2l0ZS9uSwD3hmFsL2xpYnJhcnkvdmlzaXQvd2hhdHMtb24vY2l0eS1ibG9zc29tLWV4cGVyaWVuY2VzLWltYWdlLTEtMjAyNi5qcGc_YXV0bz13ZWJwJndpZHRoPTUwNSZjcm9wPTE2OjkmZHByPTIlMjAyeCIsInR5cGUiOiJpbWciLCJzdGFydCI6MTc3NjgxNDE3NTg3MSwiZW5kFACQNjMxNiwic291NwFROiJtdXS3AKJPYnNlcnZlckNMSACQdHVzIjoibG9hjgFgcmVhc29uNgHUXSwiZGF0YVBhdHRlchIAsGxpc3QiOltdLCJp1gHvNzc4NjU5NDQwNTEwfSxoAdMgODN1AgL-ABE2fAEPaAFZLzIyaAEHQnRtcy7lAuVhbHRydXN0Lm9yZy51a68CARUA9QQvcHJvZC9Cb290c3RyYXAuanMiXAJBc2NyaX8DG3NfAk02NDI39wABFAAFXwJRSFRNTFNAANhfU0VUQVRUUklCVVRFZAJvYWxsb3dlZwIhrzcyMjQwODc2NDf_AAcQc98CH2MCAQMkanO8AyEtYz4Eci1wcmVmZXKWA2R2dWUvbnQaAN9mb3JtLmZ1bGwubWluHwGTrzYxMjkyMzYyNjgfAQcP7gQw9RhyZWdpb25zL2JhdGgtYnJpc3RvbC9wbGFjZXMvZHlyaGFtLXBhcmsWBbBidWlsdC1oZXJpdPcEEGgxANByeS1hbmQtY29sbGVjkQXzFXMvcG9zdGNhcmQtY2hpbGRyZW4tbWF5cG9sZS1kYW5jaW5nLV0A_wdnbG91Y2VzdGVyc2hpcmUtNTEyMTM4SAU9HjjpAh84SAVOnzY3MDYxODkwN8IB_zEfOKsEAA_CAVcfOKMECA-iBV03NTIwAQhwYXBwZW5kQ2UDCJYFD_oHJA-TBREP8ABKHjfnAQrwAA_xCEIE9wAfOecBCD93d3eHBgP2FmM5OWE0MjY5LTE2MWMtNDI0Mi1hM2YwLTI4ZDQ0ZmE2Y2UyND-PBzJ4aHKpAQnrCU02NTM0owQBFAAFjAeyWEhSX01BTkFHRVJBAALkCQ-AByevNjE5NDcwMjQ3NWEGBw_2AOMPVwcwBEUMkGNhbXBhaWduc7EJqnVyZS1mdXR1cmUOAP8CX2hwX2Nhcm91c2VsXzI4ODD_BgI_NzMzRwwkLzgwXAIAFzVGBA9WA0KvNjgwNTQ0ODA0NmACBw9qAb4OaQgvNTNqAVYvNTRqAQcPSgsJ8gRudC1mcm9udC1lbmQvX25leHQvLwD_Fi9jaHVua3MvcGFnZXMvc2VhcmNoLTE4Njg2YTNhMDViZWRlYjJPCxQ-NTk5hgIAFAAF4gQCqgzhX0RPTUF0dHJNb2RpZmlaDACNAAHRDg_tBCePNDk2MTcyMzbKBwkAZwAfaW0MBA8jARVDaXRlLSgB_wEwNTI4Y2VhMzBhM2ZhOTkxKAEULjYwrgMBFAAPKAFSnzU2NDY2MDkwNvwPCA8oATEPSwI-PzYwM9EETQ9EAq0IiAQPOAo70DU2NDY2MDkwNjB9XX0tms.nationaltrust.org.uk/privacy/v1... https://tms.nationaltrust.org.uk/privacy/v1/b/b.rnc?n=2&c=1182&i=64jqpt&p=prod&s=5194&d=8EZ7InZlcnNpb24iOiIxLjAuMCIsImdhdGV3YXkiOiIyLjMuODAyIiwiY2xpZW50SWQiOjExODIsInB1Ymxpc2hQYXRoIjoicHJvZCIsImluc3RhbmNlJwDwFCI2NGpxcHQiLCJwYWNrZXQiOjEsIm1vZGUiOiJlbmZvcmNlVwDwEW9va2llcyI6e30sImVudmlyb25tZW50IjoiRGVmYXVsQQDyBnJlcXVlc3RzIjpbeyJkZXN0aW5hdLMA8TRodHRwczovL250Lmdsb2JhbC5zc2wuZmFzdGx5Lm5ldC9iaW5hcmllcy9jb250ZW50L2dhbGxlcnkvd2Vic2l0ZS9uSwD3hmFsL2xpYnJhcnkvdmlzaXQvd2hhdHMtb24vY2l0eS1ibG9zc29tLWV4cGVyaWVuY2VzLWltYWdlLTEtMjAyNi5qcGc_YXV0bz13ZWJwJndpZHRoPTUwNSZjcm9wPTE2OjkmZHByPTIlMjAyeCIsInR5cGUiOiJpbWciLCJzdGFydCI6MTc3NjgxNDE3NTg3MSwiZW5kFACQNjMxNiwic291NwFROiJtdXS3AKJPYnNlcnZlckNMSACQdHVzIjoibG9hjgFgcmVhc29uNgHUXSwiZGF0YVBhdHRlchIAsGxpc3QiOltdLCJp1gHvNzc4NjU5NDQwNTEwfSxoAdMgODN1AgL-ABE2fAEPaAFZLzIyaAEHQnRtcy7lAuVhbHRydXN0Lm9yZy51a68CARUA9QQvcHJvZC9Cb290c3RyYXAuanMiXAJBc2NyaX8DG3NfAk02NDI39wABFAAFXwJRSFRNTFNAANhfU0VUQVRUUklCVVRFZAJvYWxsb3dlZwIhrzcyMjQwODc2NDf_AAcQc98CH2MCAQMkanO8AyEtYz4Eci1wcmVmZXKWA2R2dWUvbnQaAN9mb3JtLmZ1bGwubWluHwGTrzYxMjkyMzYyNjgfAQcP7gQw9RhyZWdpb25zL2JhdGgtYnJpc3RvbC9wbGFjZXMvZHlyaGFtLXBhcmsWBbBidWlsdC1oZXJpdPcEEGgxANByeS1hbmQtY29sbGVjkQXzFXMvcG9zdGNhcmQtY2hpbGRyZW4tbWF5cG9sZS1kYW5jaW5nLV0A_wdnbG91Y2VzdGVyc2hpcmUtNTEyMTM4SAU9HjjpAh84SAVOnzY3MDYxODkwN8IB_zEfOKsEAA_CAVcfOKMECA-iBV03NTIwAQhwYXBwZW5kQ2UDCJYFD_oHJA-TBREP8ABKHjfnAQrwAA_xCEIE9wAfOecBCD93d3eHBgP2FmM5OWE0MjY5LTE2MWMtNDI0Mi1hM2YwLTI4ZDQ0ZmE2Y2UyND-PBzJ4aHKpAQnrCU02NTM0owQBFAAFjAeyWEhSX01BTkFHRVJBAALkCQ-AByevNjE5NDcwMjQ3NWEGBw_2AOMPVwcwBEUMkGNhbXBhaWduc7EJqnVyZS1mdXR1cmUOAP8CX2hwX2Nhcm91c2VsXzI4ODD_BgI_NzMzRwwkLzgwXAIAFzVGBA9WA0KvNjgwNTQ0ODA0NmACBw9qAb4OaQgvNTNqAVYvNTRqAQcPSgsJ8gRudC1mcm9udC1lbmQvX25leHQvLwD_Fi9jaHVua3MvcGFnZXMvc2VhcmNoLTE4Njg2YTNhMDViZWRlYjJPCxQ-NTk5hgIAFAAF4gQCqgzhX0RPTUF0dHJNb2RpZmlaDACNAAHRDg_tBCePNDk2MTcyMzbKBwkAZwAfaW0MBA8jARVDaXRlLSgB_wEwNTI4Y2VhMzBhM2ZhOTkxKAEULjYwrgMBFAAPKAFSnzU2NDY2MDkwNvwPCA8oATEPSwI-PzYwM9EETQ9EAq0IiAQPOAo70DU2NDY2MDkwNjB9XX0 — 204 — 106 B — 37 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 3576ms · 1802KB · £37/mo
static.nationaltrust.org.uk
Other
Costly
Execution 950ms
Transfer 1217 KB
Unused 47%
Monthly Cost £10/mo
static.nationaltrust.org.uk
Other
Costly
Execution 872ms
Transfer 88 KB
Unused 51%
Monthly Cost £9/mo
tms.nationaltrust.org.uk
Other
Costly
Execution 519ms
Transfer 130 KB
Unused 74%
Monthly Cost £5/mo
www.nationaltrust.org.uk
Other
Costly
Execution 437ms
Transfer 122 KB
Monthly Cost £5/mo
www.nationaltrust.org.uk
Other
Costly
Execution 343ms
Transfer 165 KB
Unused 24%
Monthly Cost £4/mo
Unattributable
Other
Costly
Execution 258ms
Transfer 0 KB
Monthly Cost £3/mo
static.nationaltrust.org.uk
Other
Optional
Execution 114ms
Transfer 44 KB
Unused 49%
Monthly Cost £1/mo
static.nationaltrust.org.uk
Other
Optional
Execution 83ms
Transfer 37 KB
Monthly Cost £1/mo

These scripts may cost more than they're worth

  • static.nationaltrust.org.uk adds 950ms and costs ~£10/month
  • static.nationaltrust.org.uk adds 872ms and costs ~£9/month
  • tms.nationaltrust.org.uk adds 519ms and costs ~£5/month
  • www.nationaltrust.org.uk adds 437ms and costs ~£5/month
  • www.nationaltrust.org.uk adds 343ms and costs ~£4/month
  • Unattributable adds 258ms and costs ~£3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

static.nationaltrust.org.uk takes 950ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.nationaltrust.org.uk takes 872ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

51% of static.nationaltrust.org.uk's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

tms.nationaltrust.org.uk takes 519ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

74% of tms.nationaltrust.org.uk's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.nationaltrust.org.uk takes 437ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.nationaltrust.org.uk takes 343ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 258ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback