Welcome to the Uk nanny state, where safety rules above all else.
I remember reading one poll during the pandemic where a quarter of Britons wanted nightclubs to shut permanently even after the threat of the virus had subsided. For the Vernon Dursley archetype it's not enough for themselves to be allowed to live a very beige and conventional life but everyone else must be made to as well.
But this seems more like a bug? Correcting to use https has no issues...
Because they can't intercept HTTPS.
They don’t need to. DNS is still mostly in the clear, and SNI is still unencrypted so they may not know exactly what you are reading, but they definitely know what sites you are on.