Website readiness profile · Snapshot 23 October 2026
topcashback.co.uk
topcashback.co.uk's public homepage, certificate and DNS checked against 31 practices and compared with 549 Banking & Finance sites.
- Readiness index
- 82/100
- Ahead of
- 90%
- Practices observed
- 23/30
- Popularity band
- Top 50K
Banking & Finance median 66
of measured Banking & Finance sites
1 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: topcashback.co.uk. Thin bar: Banking & Finance peer median.
Enable
95/100
Peers 78
Harden
85/100
Peers 64
Accelerate
68/100
Peers 55
Recover
0/100
Peers 21
Priority fixes for topcashback.co.uk
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Modern image formats in use
Observed: The homepage had 28 images and none used WebP or AVIF.
Why it matters: WebP and AVIF are typically much smaller than JPEG or PNG at similar quality, and images are often the heaviest part of a page.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
37% of Banking & Finance peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 2 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 4 external scripts without async or defer.
What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.
36% of Banking & Finance peers do this.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 3 · Harden
Content Security Policy present
Observed: The homepage response did not include a Content-Security-Policy header.
What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.
51% of Banking & Finance peers do this.
Guide: Payment Security and PCI DSS: What Website Owners Need to Know
Priority 4 · Harden
Certificate lifetime of 100 days or less
Observed: The certificate from Amazon had a 197-day validity period, longer than the 100-day maximum that applies from March 2027.
What to do: Move to automated issuance and renewal now, while you still have time to test it.
31% of Banking & Finance peers do this.
What topcashback.co.uk already does well
Practices fewer than half of Banking & Finance peers use.
- security.txt publishedsecurity.txt with a contact found.9.4% of peers
- CAA records limit who can issue certificatesCAA limits issuance to amazon.com, amazonaws.com, amazontrust.com and others.20% of peers
- HTTP/3 advertisedHTTP/3 advertised.22% of peers
What we saw
- Homepage checked
- https://www.topcashback.co.uk/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Amazon, 197-day validity, expiring 2027-04-04
- CDN or edge
- Amazon CloudFront
- DNS operators
- Amazon Route 53
- HSTS
- max-age 365 days
- DMARC policy
- p=reject
- Homepage HTML
- 139 KB, gzip
- Images on homepage
- 28 (png 23, svg 5)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 7
Observed 23
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- CAA records limit who can issue certificates
- security.txt published
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Referrer-Policy set
- HTTP/2 negotiated
- HTTP/3 advertised
- HTML compressed
- Offscreen images lazy-loaded
- robots.txt published
- XML sitemap discoverable
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Not measured 1
- Static files cached for 30 days or more
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Live status for this site: Status Is Down: topcashback.co.uk. This profile covers configuration only.