I remember a conversation years ago when my grandad was talking about tv licenses when he was young, the tv license man called at his home looking ( my great grandad ) to produce his license. When he said he didn't have a television the man took a few steps backwards and walked onto the road looking up at the roof and said " well sir, you have an aerial in your chimney " he replied " yes that's correct ! I've a pint off milk in the fridge, but no cow in the garden " bye bye.