Dougal Marchant

The company wanted to change their touring image into a sportier one and employed Dougal Marchant as a development engineer.

Few resulting sports Chater-Lea models were sold but the firm was fortunate enough to win the contract to supply 800 AA Patrol sidecar outfits.

Austrian rider Michael Geyer won many races riding the "Camshaft" model.

[2] In 1928 Dougal Marchant went to Motosacoche who made a name in the Grand Prix, with the 350 M 35 ohc racing bike he developed, ridden to two 1928 European championship titles, 350 and 500, by Wal Handley.

The TT bike had a Unit construction powerplant, with a bevel-driven overhead camshaft.