Earlier quoted context omitted.
What censorship are they doing that cannot be easily circumvented?
For piracy sites they first blocked the dns, dumb easily circumvented use the ip. Then they blocked the ip, dumb easily circumvented spawn multiple versions. They made linking to pirate sites illegal so they could block alternative versions. They used to sniff all plaintext looking for tracker announces which look really distinctive. But their latest methods are scarily effective. They now do a man in the middle atta…
Have there been any evidence of HTTPS and/or VPNs being MITM'd by UK ISPs?
Unless the UK government has cracked all the ciphers used by HTTPS + VPNs and have backdoored every CA, I think we'd already know about widespread systematic MITM attacks in UK users. If they have done all of that, then you can bet others have too then the whole world is screwed
Please cite your sources of actual evidence. Talking about mysterious black boxes doesn't count - they could be pollution sensors for all we know.