Bristol Tramways (latterly the vast Bristol Omnibus Co) were also amongst the original founding partners of Associated Motorways.
Bristol Omnibus' coach fleet was liveried in Tilling Cream with Tilling Red relief, and ran under the 'Bristol Greyhound' fleetname as seen below:
A 1966 Bristol MW6G with the ultimate style of ECW coach body for this chassis model.
The trusty Gardner 6HLW engine was mounted horizontally in mid-wheelbase, and drove through a 5-speed overdrive 'box to an overhead worm rear axle. Although the 'MW' model was utterly reliable in service, the triple-servo vacuum brakes took some getting used to (trust me!), and you really had to anticipate the traffic conditions. The accelerator pedal was extremely heavy to hold to the floor (in typical Gardner fashion), and they were also quite economical to operate, returning upwards of 15 mpg on long distance work.
Top whack was an astounding 52 mph with that Gardner in full cry at 1750 rpm!