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https://england.nhs.uk

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
84
GRADE
B
FIX
1
REVIEW
3
PASS
4
INFO
1
Probed from Amsterdam, Netherlands
301 Moved Permanently
Checks
9
4 PASS 3 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.england.nhs.uk/
200https://england.nhs.uk/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://england.nhs.uk/ → https://www.england.nhs.uk/

Consistent

B
TLS Certificate Expiry & Recommendations
74 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

74
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
1 A records, 10 ms lookup
PASS
1 A records, 10 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 54.228.199.127
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns1.nhs.uk, ns2.nhs.uk, ns3.nhs.uk, ns4.nhs.uk
Info::
1 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 10 ms
Got: 10 ms
A54.228.199.127
AAAA—
CNAME—
NSns1.nhs.uk, ns2.nhs.uk, ns3.nhs.uk, ns4.nhs.uk
MX
10 england-nhs-uk.mail.protection.outlook.com
TXT
15evvpthm7le0hpafj7gic10pr
ZOOM_verify_u1LDSut_TpO38IFZCQvY7w
EF3E-27A9-2312-1FF4-4069-941C-4362-4BF7
apple-domain-verification=cD21DlUFvozbmqh0
teamviewer-sso-verification=29f16873e970431fbf501124fc7b7df8
globalsign-domain-verification=05F539D2527D3CBDA5E31306DAC21708
globalsign-domain-verification=1773A04C4D9A9505BF64287111E04DB9
globalsign-domain-verification=32F98BF264466C55A24FAD43A8F9D5AE
globalsign-domain-verification=CD26131C84AAB963A02214073478C228
globalsign-domain-verification=D8A808F8AF83642A1904D56F19414A02
globalsign-domain-verification=d113231605744546537a885921c40df4
google-site-verification=uHeC5GkKkDp_FmN2pc3BH0B4YfWiRmolqtr1RMGSuZg
_globalsign-domain-verification=-3NnsWnpRchIvnDJFf4X47CdOLLRTz2CtHCRZgVudB
SPF v=spf1 ip4:212.250.43.0/26 ip4:212.250.23.64/26 ip4:40.69.37.211 ip4:52.164.249....
CAALookup not available with standard resolver
Resolved in 10 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A
Redirect Chain
1 redirect(s), 745 ms total
PASS
1 redirect(s), 745 ms total
Info::
Single redirect
Got: https://england.nhs.uk → https://www.england.nhs.uk/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 745 ms total
Got: 745 ms

https://england.nhs.uk

80 ms · HTTP/1.1

301

https://www.england.nhs.uk/

665 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://england.nhs.uk30180 msHTTP/1.1nginx
2https://www.england.nhs.uk/200665 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 13 URLs
PASS
robots.txt present, sitemap with 13 URLs
Info::
robots.txt is present
Got: 116 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 13 entries
Info::
Sitemap index with 13 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 116 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

Sitemap: https://www.england.nhs.uk/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 13 entries Valid XML Yes
Child Sitemaps:
A+
HTTP Probe Timing
Total 85 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
10 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
23 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
29 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
86 ms
Total Time Total request time from DNS lookup through full response.
86 ms

Connection waterfall

DNS Lookup 10 ms TCP Connect 23 ms TLS Handshake 29 ms Server Processing 24 ms Content Transfer 0 ms
Domain Intelligence
Domain intelligence data not available
INFO
Domain intelligence data not available

RDAP and WHOIS lookup both failed

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

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