Protected chats? The ship already sailed, text messages via the phone network are already MITM'd since a very long time.

Even in real life, the police in the UK now deploy active face recognition and makes tonnes of arrests based on it (sometimes wrongly). Shops are now looking to deploy active face recognition to detect shoplifters (although it's unclear legally what they will actually do about it).

The UK can compel any person commuting through the UK to give over their passwords and devices - you have no right to appeal. Refusing to hand over the password can get you arrested under the Terrorist Act, where they can hold you indefinitely. When arrested under any terrorism offence you also have not right to legal representation.

The days of privacy sailed unnoticed.