The HTTPS certificate on www.gusjonesjewellers.co.uk is issued to a different domain.
Opening https://www.gusjonesjewellers.co.uk in any current browser triggers a full-page security warning before a customer sees a single product. The certificate served on port 443 has subject CN=adampiper.com and the verification fails with "hostname mismatch" (verified directly with openssl on 18 May 2026, against Let's Encrypt issuer R13). Most customers do not click "Advanced, proceed anyway". They close the tab and go to a chain.
What the rebuild doesThe rebuild ships on Vercel's edge network with an automatically issued and renewed certificate for gusjonesjewellers.co.uk and www.gusjonesjewellers.co.uk. No browser warning, no "are you sure" click. Renewal is handled at the platform layer, so the failure mode that caused this cannot recur.
Before / afterSSL handshake · fails → valid