The best ad I ever saw was only on the once as far as I can tell. A woman leaves her flat in just her panties, after first checking that the coast is clear, and runs to the front door to collect her post. Of course the door to her flat closes and she's stuck in the communal hall area. Just at that minute the main doorbell rings and she hears someone from upstairs coming down to answer the door so she hides in the meter cupboard under the stairs. Next think she knows the door to the cupboard is opened - it was the gasman at the door - come to read the meter! So there she is, naked and squeezed into a tiny space, and she looks at the bemused gasman and says, 'YES?!'. Ha ha - I laughed half way through the following programme thinking of it. I think it was for a cable tv channel but I don't remember which one.