Skip to content
https://metoffice.gov.uk

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
4
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
93
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.

581 ms

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

1.51 s

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

11 ms

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.

1.46 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.

2.04 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
15
5 PASS 4 REVIEW 4 FIX
D
Page Weight Budget
Action
2.3 MB transferred, 78 requests
FIX
2.3 MB transferred, 78 requests
Info::
Page weighs 6.0 MB (2.3 MB transferred)
Warning::
JavaScript is 683 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 683 KB
Info::
Fonts are 303 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 303 KB
Info::
78 HTTP requests
Info::
Estimated 0.49 g CO2 per page load
2.3 MB / 2.4 MB budget
2.3 MB transferred
78 requests
0.49 g CO2 per page load
Images 893.9 KiB 38%
JavaScript 683.0 KiB 29%
HTML 315.7 KiB 13%
Fonts 303.1 KiB 13%
Other 153.0 KiB 6%
CSS 24.7 KiB 1%
Other 2.4 KiB 0%
Other 430 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (2.3 MiB of 2.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
27 scripts, 342 KB unused
FIX
27 scripts, 342 KB unused
Warning::
https://players.brightcove.net/2310970326001/Yk2si...: 188 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://imasdk.googleapis.com/js/sdkloader/ima3_de...: 102 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cc.cdn.civiccomputing.com/9/cookieControl-...: 52 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 342 KB
342 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://players.brightcove.net/2310970326001/Yk2siaFBf_default/index.min.js326 KB188 KB (58%)✓3rd
https://imasdk.googleapis.com/js/sdkloader/ima3_debug.js160 KB102 KB (64%)✓3rd
https://cc.cdn.civiccomputing.com/9/cookieControl-9.11.min.js123 KB52 KB (42%)✓3rd
https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/geohash-location.js1 KB—✓3rd
https://www.metoffice.gov.uk/webfiles/1764673469274/js/preview-block/lazy-load-preview-block.js0 KB—✓3rd
https://www.metoffice.gov.uk/static/js/external/latlon-geohash/latlon-geohash@2.0.0.js1 KB—✓3rd
https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/set-body-class.js1 KB—✓3rd
https://www.metoffice.gov.uk/webfiles/1764673469274/js/minified/global.min.js9 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/iamdustan-smoothscroll/0.4.0/smoothscroll.min.js2 KB—✓3rd
https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/run-scripts-requiring-consent.js2 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

D
Page Weight Inventory
Action
78 resources · 2.3 MB · 342 KB savings available
FIX
78 resources · 2.3 MB · 342 KB savings available
Warning::
Page weight 1.3 MB over 1MB target
Got: 2.3 MB Expected: ≤ 1 MB
Info::
~342 KB of savings available
Warning::
77 third-party resources (100% of weight)
Info::
4 resources over 200KB
78 resources · 2.3 MiB · 77 third-party 1.3 MiB over 1MB target
Image 38% · 896.2 KiB
JavaScript 29% · 683.0 KiB
Document 13% · 315.7 KiB
Font 13% · 303.1 KiB
Other 6% · 153.5 KiB
CSS 1% · 24.7 KiB

~341.9 KiB of savings available

Remove unused JavaScript: 341.9 KiB
B
Image Optimization
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
https://www.metoffice.gov.uk/webfiles/176467346927... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25 images 894 KB
0 oversized -0 KB
25 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Execution Cost
608ms total JS execution
REVIEW
608ms total JS execution
Info::
https://players.brightcove.net/2310970326001/Yk2si...: 239ms CPU time
Info::
Unattributable: 127ms CPU time
Info::
https://www.metoffice.gov.uk/: 120ms CPU time
Info::
https://www.metoffice.gov.uk/public/gdpr-consent/c...: 67ms CPU time
Info::
https://cc.cdn.civiccomputing.com/9/cookieControl-...: 54ms CPU time
Warning::
Third-party scripts: 608ms (100% of total)

Main Thread Breakdown

Script Evaluation 49% Other 26% Style & Layout 10% Script Parsing & Compilation 8% Parse HTML & CSS 4% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://players.brightcove.net/2310970326001/Yk2siaFBf_default/index.min.js239ms187ms27ms3rd
Unattributable127ms2ms0ms3rd
https://www.metoffice.gov.uk/120ms5ms1ms3rd
https://www.metoffice.gov.uk/public/gdpr-consent/cookieControl-config.js?176467346927467ms35ms0ms3rd
https://cc.cdn.civiccomputing.com/9/cookieControl-9.11.min.js54ms45ms9ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
Cache-Control header is set
Got: max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0

DirectiveValueMeaning
max-age0Cache for 0 seconds
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+
Font Loading
5 fonts (303 KB)
PASS
5 fonts (303 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

303 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 581 ms LCP 1.5 shttps://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Regular.woffFSEmericWeb-Regular.woff https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Regular.woff — 73.9 KiB — 45 ms — font-display: swaphttps://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Italic.woffFSEmericWeb-Italic.woff https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Italic.woff — 74.9 KiB — 45 ms — font-display: swaphttps://www.metoffice.gov.uk/static/fonts/FSEmericWeb-SemiBold.woffFSEmericWeb-SemiBold.woff https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-SemiBold.woff — 74.7 KiB — 46 ms — font-display: swaphttps://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Light.woffFSEmericWeb-Light.woff https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Light.woff — 74.4 KiB — 50 ms — font-display: swapdata:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABTsAAsAAAAAIpAAAQAAAAAAAAAAAAAAAAAAAAA…font-woff;charset=utf-8... data:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABTsAAsAAAAAIpAAAQAAAAAAAAAAAAAAAAAAAAA… — 5.2 KiB — 39 ms — font-display: swap
FSEmericWeb-Regular.woff woff swap
Size 74 KB
Load time 45 ms
Start 159 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
FSEmericWeb-Italic.woff woff swap
Size 75 KB
Load time 45 ms
Start 160 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
FSEmericWeb-SemiBold.woff woff swap
Size 75 KB
Load time 46 ms
Start 160 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
FSEmericWeb-Light.woff woff swap
Size 74 KB
Load time 50 ms
Start 160 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
font-woff;charset=utf-8... woff swap
Size 5 KB
Load time 39 ms
Start 520 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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)

Fixing the unchecked items could save ~91 KB and ~182 ms

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
Network Waterfall
78 requests over 1133ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 581 ms LCP 1.5 shttps://metoffice.gov.uk// https://metoffice.gov.uk/ — 301 — 123 B — 88 ms — h2https://www.metoffice.gov.uk/www.metoffice.gov.uk/ https://www.metoffice.gov.uk/ — 200 — 15.3 KiB — 62 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/set-body-class.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/set-body-class.js — 200 — 600 B — 38 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Regular.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Regular.woff — 200 — 73.9 KiB — 45 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Italic.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Italic.woff — 200 — 74.9 KiB — 45 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-SemiBold.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-SemiBold.woff — 200 — 74.7 KiB — 46 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Light.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Light.woff — 200 — 74.4 KiB — 50 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/footer.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/footer.css — 200 — 3.3 KiB — 15 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/base.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/base.css — 200 — 11.7 KiB — 37 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/run-ab-test.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/run-ab-test.js — 200 — 1.2 KiB — 46 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/breadcrumb.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/breadcrumb.css — 200 — 653 B — 27 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/feedback-banner.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/feedback-banner.css — 200 — 547 B — 28 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/mapping/control/controls/titleControl/titleControl.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/mapping/control/controls/titleControl/titleControl.css — 200 — 714 B — 29 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/flood-warnings.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/flood-warnings.css — 200 — 830 B — 29 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/recent-locations-update.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/recent-locations-update.css — 200 — 1.7 KiB — 30 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/location-search-update.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/location-search-update.css — 200 — 1.6 KiB — 31 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/homepage.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/homepage.css — 200 — 1.9 KiB — 32 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/forecast-video.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/forecast-video.css — 200 — 1.8 KiB — 32 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/minified/homepage.min.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/minified/homepage.min.js — 200 — 3.7 KiB — 45 ms — h2https://www.metoffice.gov.uk/public/hero-images/2026/spring/640x491.jpgwww.metoffice.gov.uk/public/hero-im... https://www.metoffice.gov.uk/public/hero-images/2026/spring/640x491.jpg — 200 — 92.0 KiB — 48 ms — h2https://www.metoffice.gov.uk/public/hero-images/2026/spring/1280x503.jpgwww.metoffice.gov.uk/public/hero-im... https://www.metoffice.gov.uk/public/hero-images/2026/spring/1280x503.jpg — 200 — 209.2 KiB — 49 ms — h2https://www.metoffice.gov.uk/public/hero-images/2026/spring/1600x609.jpgwww.metoffice.gov.uk/public/hero-im... https://www.metoffice.gov.uk/public/hero-images/2026/spring/1600x609.jpg — 200 — 412.0 KiB — 69 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/util/iabtcf-es/stub.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/util/iabtcf-es/stub.js — 200 — 855 B — 55 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/logos/mo-green-white.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/logos/mo-green-white.svg — 200 — 1.2 KiB — 59 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-grey.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-grey.svg — 200 — 473 B — 60 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/components/location-search.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/components/location-search.js — 200 — 11.3 KiB — 65 ms — h2https://www.metoffice.gov.uk/static/js/external/latlon-geohash/latlon-geohash@2.0.0.jswww.metoffice.gov.uk/static/js/exte... https://www.metoffice.gov.uk/static/js/external/latlon-geohash/latlon-geohash@2.0.0.js — 200 — 1.3 KiB — 56 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/geohash-location.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/geohash-location.js — 200 — 828 B — 57 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-green.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-green.svg — 200 — 481 B — 25 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-white.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-white.svg — 200 — 477 B — 26 ms — h2
0 ms 500 ms 1.0 s 1.5 s FCP 581 ms LCP 1.5 shttps://metoffice.gov.uk// https://metoffice.gov.uk/ — 301 — 123 B — 88 ms — h2https://www.metoffice.gov.uk/www.metoffice.gov.uk/ https://www.metoffice.gov.uk/ — 200 — 15.3 KiB — 62 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/set-body-class.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/set-body-class.js — 200 — 600 B — 38 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Regular.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Regular.woff — 200 — 73.9 KiB — 45 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Italic.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Italic.woff — 200 — 74.9 KiB — 45 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-SemiBold.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-SemiBold.woff — 200 — 74.7 KiB — 46 ms — h2https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Light.woffwww.metoffice.gov.uk/static/fonts/F... https://www.metoffice.gov.uk/static/fonts/FSEmericWeb-Light.woff — 200 — 74.4 KiB — 50 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/footer.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/footer.css — 200 — 3.3 KiB — 15 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/base.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/base.css — 200 — 11.7 KiB — 37 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/run-ab-test.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/run-ab-test.js — 200 — 1.2 KiB — 46 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/breadcrumb.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/breadcrumb.css — 200 — 653 B — 27 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/feedback-banner.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/feedback-banner.css — 200 — 547 B — 28 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/mapping/control/controls/titleControl/titleControl.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/mapping/control/controls/titleControl/titleControl.css — 200 — 714 B — 29 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/flood-warnings.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/flood-warnings.css — 200 — 830 B — 29 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/recent-locations-update.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/recent-locations-update.css — 200 — 1.7 KiB — 30 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/location-search-update.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/location-search-update.css — 200 — 1.6 KiB — 31 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/homepage.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/homepage.css — 200 — 1.9 KiB — 32 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/forecast-video.csswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/css/compiled/components/forecast-video.css — 200 — 1.8 KiB — 32 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/minified/homepage.min.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/minified/homepage.min.js — 200 — 3.7 KiB — 45 ms — h2https://www.metoffice.gov.uk/public/hero-images/2026/spring/640x491.jpgwww.metoffice.gov.uk/public/hero-im... https://www.metoffice.gov.uk/public/hero-images/2026/spring/640x491.jpg — 200 — 92.0 KiB — 48 ms — h2https://www.metoffice.gov.uk/public/hero-images/2026/spring/1280x503.jpgwww.metoffice.gov.uk/public/hero-im... https://www.metoffice.gov.uk/public/hero-images/2026/spring/1280x503.jpg — 200 — 209.2 KiB — 49 ms — h2https://www.metoffice.gov.uk/public/hero-images/2026/spring/1600x609.jpgwww.metoffice.gov.uk/public/hero-im... https://www.metoffice.gov.uk/public/hero-images/2026/spring/1600x609.jpg — 200 — 412.0 KiB — 69 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/util/iabtcf-es/stub.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/util/iabtcf-es/stub.js — 200 — 855 B — 55 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/logos/mo-green-white.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/logos/mo-green-white.svg — 200 — 1.2 KiB — 59 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-grey.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-grey.svg — 200 — 473 B — 60 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/components/location-search.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/components/location-search.js — 200 — 11.3 KiB — 65 ms — h2https://www.metoffice.gov.uk/static/js/external/latlon-geohash/latlon-geohash@2.0.0.jswww.metoffice.gov.uk/static/js/exte... https://www.metoffice.gov.uk/static/js/external/latlon-geohash/latlon-geohash@2.0.0.js — 200 — 1.3 KiB — 56 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/geohash-location.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/geohash-location.js — 200 — 828 B — 57 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-green.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-green.svg — 200 — 481 B — 25 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-white.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right-white.svg — 200 — 477 B — 26 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/minified/global.min.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/minified/global.min.js — 200 — 9.2 KiB — 14 ms — h2https://cdnjs.cloudflare.com/ajax/libs/iamdustan-smoothscroll/0.4.0/smoothscroll.min.jscdnjs.cloudflare.com/ajax/libs/iamd... https://cdnjs.cloudflare.com/ajax/libs/iamdustan-smoothscroll/0.4.0/smoothscroll.min.js — 200 — 1.8 KiB — 52 ms — h3https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/run-scripts-requiring-consent.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/run-scripts-requiring-consent.js — 200 — 1.6 KiB — 27 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/cross-domain-storage.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/common/cross-domain-storage.js — 200 — 883 B — 27 ms — h2https://www.metoffice.gov.uk/manifest.jsonwww.metoffice.gov.uk/manifest.json https://www.metoffice.gov.uk/manifest.json — 200 — 430 B — 47 ms — h2https://www.metoffice.gov.uk/public/adhoc/mo-adhoc.js?1764673469274www.metoffice.gov.uk/public/adhoc/m... https://www.metoffice.gov.uk/public/adhoc/mo-adhoc.js?1764673469274 — 200 — 1.6 KiB — 28 ms — h2https://www.metoffice.gov.uk/public/gdpr-consent/cookieControl-config.js?1764673469274www.metoffice.gov.uk/public/gdpr-co... https://www.metoffice.gov.uk/public/gdpr-consent/cookieControl-config.js?1764673469274 — 200 — 2.2 KiB — 30 ms — h2https://www.metoffice.gov.uk/public/gdpr-consent/setAbTestConsent.js?1764673469274www.metoffice.gov.uk/public/gdpr-co... https://www.metoffice.gov.uk/public/gdpr-consent/setAbTestConsent.js?1764673469274 — 200 — 633 B — 31 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/preview-block/lazy-load-preview-block.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/preview-block/lazy-load-preview-block.js — 200 — 506 B — 31 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/logos/mo-logo-black.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/logos/mo-logo-black.svg — 200 — 1.2 KiB — 32 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/flood-warnings/flood-WARNING.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/flood-warnings/flood-WARNING.svg — 200 — 2.2 KiB — 33 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/app-badges/google-play-badge.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/app-badges/google-play-badge.svg — 200 — 8.1 KiB — 36 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/app-badges/apple-store-badge.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/app-badges/apple-store-badge.svg — 200 — 7.5 KiB — 36 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/js/mapping/lazy-load-map.jswww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/js/mapping/lazy-load-map.js — 200 — 641 B — 17 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/global-icons.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/global-icons.svg — 200 — 967 B — 25 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/warnings/warning-triangles.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/warnings/warning-triangles.svg — 200 — 545 B — 25 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/hero-arrow-icon.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/hero-arrow-icon.svg — 200 — 375 B — 23 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/common/chevron-right.svg — 200 — 479 B — 25 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/preview-blocks/ic_view_list.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/preview-blocks/ic_view_list.svg — 200 — 635 B — 25 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/follow-icon-sprites-light.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/follow-icon-sprites-light.svg — 200 — 3.1 KiB — 28 ms — h2https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/whatsapp-white.svgwww.metoffice.gov.uk/webfiles/17646... https://www.metoffice.gov.uk/webfiles/1764673469274/images/icons/whatsapp-white.svg — 200 — 1.1 KiB — 23 ms — h2https://www.metoffice.gov.uk/static/images/video-forecasts/video-preview.jpgwww.metoffice.gov.uk/static/images/... https://www.metoffice.gov.uk/static/images/video-forecasts/video-preview.jpg — 200 — 17.7 KiB — 11 ms — h2https://www.metoffice.gov.uk/public/adhoc/mo-adhoc-gsc.jswww.metoffice.gov.uk/public/adhoc/m... https://www.metoffice.gov.uk/public/adhoc/mo-adhoc-gsc.js — 200 — 1.9 KiB — 10 ms — h2https://www.metoffice.gov.uk/public/adhoc/set-expiry-cookie-control.jswww.metoffice.gov.uk/public/adhoc/s... https://www.metoffice.gov.uk/public/adhoc/set-expiry-cookie-control.js — 200 — 713 B — 15 ms — h2https://cc.cdn.civiccomputing.com/9/cookieControl-9.11.min.jscc.cdn.civiccomputing.com/9/cookieC... https://cc.cdn.civiccomputing.com/9/cookieControl-9.11.min.js — 200 — 123.4 KiB — 125 ms — h3https://www.metoffice.gov.uk/includes/warnings-summarywww.metoffice.gov.uk/includes/warni... https://www.metoffice.gov.uk/includes/warnings-summary — 204 — 384 B — 77 ms — h2https://players.brightcove.net/2310970326001/Yk2siaFBf_default/index.min.jsplayers.brightcove.net/231097032600... https://players.brightcove.net/2310970326001/Yk2siaFBf_default/index.min.js — 200 — 325.7 KiB — 43 ms — h2data:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABTsAAsAAAAAIpAAAQAAAAAAAAAAAAAAAAAAAAA…data:application/font-woff;charset=... data:application/font-woff;charset=utf-8;base64,d09GRgABAAAAABTsAAsAAAAAIpAAAQAAAAAAAAAAAAAAAAAAAAA… — 200 — 5.2 KiB — 39 ms — datahttps://imasdk.googleapis.com/js/sdkloader/ima3_debug.jsimasdk.googleapis.com/js/sdkloader/... https://imasdk.googleapis.com/js/sdkloader/ima3_debug.js — 200 — 160.3 KiB — 170 ms — h2https://edge.api.brightcove.com/playback/v1/accounts/2310970326001/playlists/2320300299001?limit=100edge.api.brightcove.com/playback/v1... https://edge.api.brightcove.com/playback/v1/accounts/2310970326001/playlists/2320300299001?limit=100 — 200 — 0 B — 33 ms — h2https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&event=player_init&time=1776813292202&autoplay=false&seq=0metrics.brightcove.com/v2/tracker?d... https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&event=player_init&time=1776813292202&autoplay=false&seq=0 — 200 — 88 B — 164 ms — h2https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&event=catalog_request&url=https%3A%2F%2Fedge.api.brightcove.com%2Fplayback%2Fv1%2Faccounts%2F2310970326001%2Fplaylists%2F2320300299001%3Flimit%3D100&time=1776813292214&autoplay=false&seq=1metrics.brightcove.com/v2/tracker?d... https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&event=catalog_request&url=https%3A%2F%2Fedge.api.brightcove.com%2Fplayback%2Fv1%2Faccounts%2F2310970326001%2Fplaylists%2F2320300299001%3Flimit%3D100&time=1776813292214&autoplay=false&seq=1 — 200 — 276 B — 162 ms — h2https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&autoplay=false&ads_enabled=true&usage=ads!7.5.2%2CcontribAds6Shim!%2Cima3!5.4.10%2Csocial!5.0.2%2CcheckConsentAndLoadTagManager!%2Cinpage-embed&event=player_load&time=1776813292233&qos.performance.memory.jsHeapSizeLimit=2248146944&qos.performance.memory.usedJSHeapSize=18308741&qos.performance.memory.totalJSHeapSize=43296669&qos.performance.navigation.redirectCount=0&qos.performance.navigation.type=0&qos.performance.navigation.directedMigration=false&qos.performance.timing.loadEventEnd=0&qos.performance.timing.loadEventStart=0&qos.performance.timing.domComplete=0&qos.performance.timing.domContentLoadedEventEnd=1776813292004&qos.performance.timing.domContentLoadedEventStart=1776813291999&qos.performance.timing.domInteractive=1776813291988&qos.performance.timing.domLoading=1776813291823&qos.performance.timing.responseEnd=1776813291819&qos.performance.timing.responseStart=1776813291817&qos.performance.timing.requestStart=1776813291805&qos.performance.timing.secureConnectionStart=1776813291800&qos.performance.timing.connectEnd=1776813291804&qos.performance.timing.connectStart=1776813291799&qos.performance.timing.domainLookupEnd=1776813291799&qos.performance.timing.domainLookupStart=1776813291757&qos.performance.timing.fetchStart=1776813291756&qos.performance.timing.redirectEnd=0&qos.performance.timing.redirectStart=0&qos.performance.timing.unloadEventEnd=0&qos.performance.timing.unloadEventStart=0&qos.performance.timing.navigationStart=1776813291666&qos.player.dimensions=%5B%5B1776813292233%2C%220x0%22%2C%221024x576%22%5D%5D&qos.player.pixelratio=%5B%5B1776813292233%2C1%5D%5D&qos.player.screendimensions=%5B%5B1776813292233%2C%22800x600%22%5D%5D&seq=2metrics.brightcove.com/v2/tracker?d... https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&autoplay=false&ads_enabled=true&usage=ads!7.5.2%2CcontribAds6Shim!%2Cima3!5.4.10%2Csocial!5.0.2%2CcheckConsentAndLoadTagManager!%2Cinpage-embed&event=player_load&time=1776813292233&qos.performance.memory.jsHeapSizeLimit=2248146944&qos.performance.memory.usedJSHeapSize=18308741&qos.performance.memory.totalJSHeapSize=43296669&qos.performance.navigation.redirectCount=0&qos.performance.navigation.type=0&qos.performance.navigation.directedMigration=false&qos.performance.timing.loadEventEnd=0&qos.performance.timing.loadEventStart=0&qos.performance.timing.domComplete=0&qos.performance.timing.domContentLoadedEventEnd=1776813292004&qos.performance.timing.domContentLoadedEventStart=1776813291999&qos.performance.timing.domInteractive=1776813291988&qos.performance.timing.domLoading=1776813291823&qos.performance.timing.responseEnd=1776813291819&qos.performance.timing.responseStart=1776813291817&qos.performance.timing.requestStart=1776813291805&qos.performance.timing.secureConnectionStart=1776813291800&qos.performance.timing.connectEnd=1776813291804&qos.performance.timing.connectStart=1776813291799&qos.performance.timing.domainLookupEnd=1776813291799&qos.performance.timing.domainLookupStart=1776813291757&qos.performance.timing.fetchStart=1776813291756&qos.performance.timing.redirectEnd=0&qos.performance.timing.redirectStart=0&qos.performance.timing.unloadEventEnd=0&qos.performance.timing.unloadEventStart=0&qos.performance.timing.navigationStart=1776813291666&qos.player.dimensions=%5B%5B1776813292233%2C%220x0%22%2C%221024x576%22%5D%5D&qos.player.pixelratio=%5B%5B1776813292233%2C1%5D%5D&qos.player.screendimensions=%5B%5B1776813292233%2C%22800x600%22%5D%5D&seq=2 — 200 — 88 B — 146 ms — h2https://edge.api.brightcove.com/playback/v1/accounts/2310970326001/playlists/2320300299001?limit=100edge.api.brightcove.com/playback/v1... https://edge.api.brightcove.com/playback/v1/accounts/2310970326001/playlists/2320300299001?limit=100 — 200 — 8.0 KiB — 6 ms — h2https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&autoplay=false&ads_enabled=true&event=catalog_response&url=https%3A%2F%2Fedge.api.brightcove.com%2Fplayback%2Fv1%2Faccounts%2F2310970326001%2Fplaylists%2F2320300299001%3Flimit%3D100&time=1776813292261&seq=3&response_time_ms=47metrics.brightcove.com/v2/tracker?d... https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&autoplay=false&ads_enabled=true&event=catalog_response&url=https%3A%2F%2Fedge.api.brightcove.com%2Fplayback%2Fv1%2Faccounts%2F2310970326001%2Fplaylists%2F2320300299001%3Flimit%3D100&time=1776813292261&seq=3&response_time_ms=47 — 200 — 88 B — 121 ms — h2https://cf-images.eu-west-1.prod.boltdns.net/v1/static/2310970326001/4f6cb4f4-b685-45b7-8410-4a3f596e8259/0669b926-06de-4f9d-9a40-354391c405a9/1280x720/match/image.jpgcf-images.eu-west-1.prod.boltdns.ne... https://cf-images.eu-west-1.prod.boltdns.net/v1/static/2310970326001/4f6cb4f4-b685-45b7-8410-4a3f596e8259/0669b926-06de-4f9d-9a40-354391c405a9/1280x720/match/image.jpg — 200 — 133.7 KiB — 13 ms — h2blob:https://www.metoffice.gov.uk/72a34ccb-3943-44eb-b644-f1d9eea073c6www.metoffice.gov.uk/72a34ccb-3943-... blob:https://www.metoffice.gov.uk/72a34ccb-3943-44eb-b644-f1d9eea073c6 — 200 — -1 B — 42 ms — blobblob:https://www.metoffice.gov.uk/8d4eec67-8783-4b01-9fb3-6ae65251ef42www.metoffice.gov.uk/8d4eec67-8783-... blob:https://www.metoffice.gov.uk/8d4eec67-8783-4b01-9fb3-6ae65251ef42 — 200 — -1 B — 52 ms — blobblob:https://www.metoffice.gov.uk/985faa0b-be15-4fa6-819f-853c4b833f74www.metoffice.gov.uk/985faa0b-be15-... blob:https://www.metoffice.gov.uk/985faa0b-be15-4fa6-819f-853c4b833f74 — 200 — -1 B — 58 ms — blobblob:https://www.metoffice.gov.uk/4daf4988-d7f2-401c-af6e-2dadc9ecdf29www.metoffice.gov.uk/4daf4988-d7f2-... blob:https://www.metoffice.gov.uk/4daf4988-d7f2-401c-af6e-2dadc9ecdf29 — 200 — -1 B — 58 ms — blobhttps://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&autoplay=false&ads_enabled=true&media_type=video&time=1776813292332&event=video_impression&video=6393568965112&video_name=Met%20Office%20Tuesday%20Evening%20Weather%20Forecast%2021%2F04%2F2026&reference_id=&custom_fields=%5Bobject%20Object%5D&video_data=%5Bobject%20Object%5D&video_ads_supported=true&tags=forecast%2Clive&video_duration=220&media_url=https%3A%2F%2Fmanifest.prod.boltdns.net%2Fmanifest%2Fv1%2Fhls%2Fv4%2Fclear%2F2310970326001%2F4f6cb4f4-b685-45b7-8410-4a3f596e8259%2F10s%2Fmaster.m3u8%3Ffastly_token%3DNjllODUwNjBfOWM5MDlmYzAxNzU1MTQ5YjU3NzNmZDRhN2EyODk0ZmZjYjIzN2VmMGNkNzljOGU0NGVhNzBlZjlkMjA1ZDJmMQ%253D%253D&qos.content.sourceMimeType=application%2Fvnd.apple.mpegurl&seq=4_0&web_ad_info=%7B%22plugin%22%3A%22ima3%22%2C%22pluginVersion%22%3A%225.4.10%22%2C%22requestMode%22%3A%22onplay%22%2C%22timeout%22%3A4000%7D&preload=nonemetrics.brightcove.com/v2/tracker?d... https://metrics.brightcove.com/v2/tracker?domain=videocloud&platform=video-js&session=78eaf17d9a12d265f9e25a1&player_mode=media&account=2310970326001&destination=https%3A%2F%2Fwww.metoffice.gov.uk%2F&platform_version=7.42.4&player=players.brightcove.com%2F2310970326001%2FYk2siaFBf_default&player_name=Web%20Beta%20-%20Kallum&source=&autoplay=false&ads_enabled=true&media_type=video&time=1776813292332&event=video_impression&video=6393568965112&video_name=Met%20Office%20Tuesday%20Evening%20Weather%20Forecast%2021%2F04%2F2026&reference_id=&custom_fields=%5Bobject%20Object%5D&video_data=%5Bobject%20Object%5D&video_ads_supported=true&tags=forecast%2Clive&video_duration=220&media_url=https%3A%2F%2Fmanifest.prod.boltdns.net%2Fmanifest%2Fv1%2Fhls%2Fv4%2Fclear%2F2310970326001%2F4f6cb4f4-b685-45b7-8410-4a3f596e8259%2F10s%2Fmaster.m3u8%3Ffastly_token%3DNjllODUwNjBfOWM5MDlmYzAxNzU1MTQ5YjU3NzNmZDRhN2EyODk0ZmZjYjIzN2VmMGNkNzljOGU0NGVhNzBlZjlkMjA1ZDJmMQ%253D%253D&qos.content.sourceMimeType=application%2Fvnd.apple.mpegurl&seq=4_0&web_ad_info=%7B%22plugin%22%3A%22ima3%22%2C%22pluginVersion%22%3A%225.4.10%22%2C%22requestMode%22%3A%22onplay%22%2C%22timeout%22%3A4000%7D&preload=none — 200 — 88 B — 122 ms — h2https://apikeys.civiccomputing.com/c/v?d=www.metoffice.gov.uk&p=CookieControl%20Multi-Site&v=9&k=0144bb529edfc11085639c504ecae11c033749c5&format=jsonapikeys.civiccomputing.com/c/v?d=ww... https://apikeys.civiccomputing.com/c/v?d=www.metoffice.gov.uk&p=CookieControl%20Multi-Site&v=9&k=0144bb529edfc11085639c504ecae11c033749c5&format=json — 200 — 620 B — 50 ms — h3https://imasdk.googleapis.com/js/core/bridge3.758.1_debug_en.html?gdpr=1imasdk.googleapis.com/js/core/bridg... https://imasdk.googleapis.com/js/core/bridge3.758.1_debug_en.html?gdpr=1 — 200 — 300.4 KiB — 157 ms — h2https://s0.2mdn.net/instream/video/client.jss0.2mdn.net/instream/video/client.j... https://s0.2mdn.net/instream/video/client.js — 200 — 16.8 KiB — 78 ms — h2https://pagead2.googlesyndication.com/omsdk/releases/live/omweb-v1.jspagead2.googlesyndication.com/omsdk... https://pagead2.googlesyndication.com/omsdk/releases/live/omweb-v1.js — 200 — 15.4 KiB — 80 ms — h3https://cc.cdn.civiccomputing.com/vl/v3/vendor-list.jsoncc.cdn.civiccomputing.com/vl/v3/ven... https://cc.cdn.civiccomputing.com/vl/v3/vendor-list.json — 200 — 102.7 KiB — 41 ms — h3https://cc.cdn.civiccomputing.com/vl/additional-consent-providers.jsoncc.cdn.civiccomputing.com/vl/additi... https://cc.cdn.civiccomputing.com/vl/additional-consent-providers.json — 200 — 41.3 KiB — 40 ms — h3https://www.metoffice.gov.uk/favicon.pngwww.metoffice.gov.uk/favicon.png https://www.metoffice.gov.uk/favicon.png — 200 — 2.3 KiB — 9 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 608ms · 467KB · £6/mo
players.brightcove.net
Other
Costly
Execution 239ms
Transfer 326 KB
Unused 58%
Monthly Cost £2/mo
Unattributable
Other
Optional
Execution 127ms
Transfer 0 KB
Monthly Cost £1/mo
www.metoffice.gov.uk
Other
Optional
Execution 120ms
Transfer 15 KB
Monthly Cost £1/mo
www.metoffice.gov.uk
Other
Optional
Execution 67ms
Transfer 2 KB
Monthly Cost £1/mo
cc.cdn.civiccomputing.com
Other
Optional
Execution 54ms
Transfer 123 KB
Unused 42%
Monthly Cost £1/mo

These scripts may cost more than they're worth

  • players.brightcove.net adds 239ms and costs ~£2/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

players.brightcove.net takes 239ms 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

58% of players.brightcove.net'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

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