Of late I've been seeing bleeding audi's absolutely everywhere (esp A3's) a few years ago the most common seemed to be bmw's. It seems the "alternative cool/unique choice" nowadays are ford/vauxhalls rather than ze germans.
Probably a Ford Focus, since it's been the best selling car in the UK since it came out in MK1 form, and for much of the MK2's life too. You just probably don't notice them anymore. Like electricity pylons.