Not on the A2 but on the Corsa.
It seems like the only time we're allowed to show any pride in being English without being arrested for racial aggravation - but thats a whole different story.
I personally think its great to see so many flags flying from cars, houses etc.
There is a thread on the xpower-mg forum about flying the flag on non-british cars - basically they are saying your a hypocrite if you do - there very passionate about MG-Rover over there!!!