I don't see how it is, you wont have your phone searched if you come here.

Can't find out whether this is currently happening, the rules seem unclear.

I can definitely find someone asking for the power in Hansard a couple of years ago: https://hansard.parliament.uk/commons/2023-12-05/debates/D4E...

Except of course if you post something without a loicense.

Terrorism Act.