The links at the bottom have a bit more info, but this is the general idea:
Raleigh EuroBike
Gas up your Guzzi, buff up the Beemer, drag out your Ducati, putt on down with your Piaggio, hustle over on your Husky, be seen on your Bimota.... You get it.
Nortons, Montesas, Cagivas, Urals...