They have zero power, it's just a man with a clipboard asking to have a look around your house, the correct response is to shut the door in their face.
They rely on a uniform and vague threatening language to trick people into thinking they have any authority.
Not a UK citizen, but from previous discussions on the topic:
> There are people going door-to-door to check TV licenses?
yes
> Are they cops?
no
> what kind of power do they have?
none. I mean write you a fine if you admit to illegally watching TV I guess. But as far as I've been told you can have the TV on and visible to the guy and go "nah that's an aquarium" and be fine.
There are people going door-to-door to check TV licenses? Are they cops, what kind of power do they have? Seems extremely annoying and dystopian.