The Yellow Townsman Scammell 

The Yellow Townsman Scammell FDN 361D arriving back to The Museum of Scottish Railways at the Bo'ness and Kinneil Railway after some mechanical work.
Some facts:-
The Townsman replaced the Scarab and its predecessor the Mechanical Horse and utilized many developments in large vehicles including a fibreglass cab, vacuum-assisted hydraulic brakes and although the same automatic coupling feature was used this now used a vacuum operated release mechanism rather than a hand lever found in earlier models.
Despite numerous improvements the Townsman was mainly only sold to British Rail and the Royal Mail and production ended in 1968.
The Scammell or "FAR" was also made under licence by the French company Chenard-Walker and used the Citroen Traction Avant engine. Production of this version began in 1937, and was known is France as the Pony Mécanique. This continued in production, in various versions, until 1970.
Scammell Townsman
Production of the Scarab ceased in 1967 and it was replaced with the Scammell Townsman that now featured a fibreglass cab. Like that fitted to the Trunker, Handyman and Routeman, it was designed by Giovanni Michelotti. The Townsman utilised many developments in large vehicles including vacuum-assisted hydraulic brakes and although the same automatic coupling feature was used, this now used a vacuum-operated release mechanism rather than the hand lever found in earlier models. Despite numerous improvements, the Townsman was mainly sold to British Rail and the Royal Mail and production ended in 1968 as forthcoming construction and use regulations mandating dual-line brakes on articulated combinations could not be met.