I love that car ad! With the little kids like, 'It's got satellite navigation, sunroof...' and looking at their parents acting stupid, and saying, 'They've have a tiring day, bless 'em' type stuff! It's rather amusante!
I hate the PI one as well - and all those, 'I tripped over my shoelace at work and decided to screw over my employer' ones. They're so cheaply done.
But, 'You buy one, you get one free, I said you buy one, you get one free!' has to be one of the greatest adverts ever! That's proper Yorkshire cheapness, that is!