I've lived in my house for a year now and I don't have TV (I'm one of those hippies that doesn't even watch catch up!).
Yesterday I was rooting around in my cellar doing some tidying when I noticed a switch I'd never seen before. Looked a bit like a normal electric switch and it was on. Assuming that I could turn it back on if I noticed anything without power I turned it off in case it was using electricty and continued tidying.
About 10 minutes later I had a knock on the door and found my next door neighbour there. He politely asked whether I'd done something to the TV aerial as about 10 minutes previously his TV had stopped working. I told him about the switch in the cellar and he said "that'll be it then, could you pop it back on?"
To keep the peace while I thought about it I went and switched the switch back on but it seems awfully bizarre to me. I'm a rural lass at heart - is this a normal thing in cities? Is it costing me? I'm struggling to find much about it on the interwebs.