Why bother? They can just visit Cloudflare HQ, who already proxy 19.3%[1] of the internet. AFAICT, all https traffic proxied by them is accessible to them in plaintext. Of course, Cloudflare are disallowed by law from letting us know if the UK government were surveilling all of their proxied traffic.[2]

[1] according to this particular metric: https://w3techs.com/technologies/details/cn-cloudflare [2] "the IPA makes it illegal for companies to disclose the existence of such government demands." https://www.macrumors.com/2025/02/21/apple-pulls-encrypted-i...

IANAL