Ian's Bus Stop - detailed histories of London's buses class by class.

Bus Lists on the Web - invaluable resource for enthusiasts seeking out particular vehicles.

The Internet Movie Database

The Internet Movie Car Database - like this website but for all wheeled transport.

London Bus Routes - details for the enthusiast on current routes and operators.

London Transport Central Buses - historical details of the evolution of London's bus network.

Bristol Commercial Vehicles Enthusiasts - lots of histories of Bristol VRs, Lodekkas, LHs, REs