Avon built cars on chassis from a number of manufacturers, but mostly Standards, at their works in Warwick, mainly in the early and mid 1930's. Here are features on some of them:
Gordon-England built about 50 cars on the 1929 Standard 9 chassis.
Railton built about 50 cars on the Standard Flying 9 chassis with a Flying 10 engine
Salmon and Sons and Tickford built cars on Standard chassis in the mid thirties
Damyon Brothers, a Melbourne based Coachbuilder
Barrou. I know nothing about this French Coachbuilder, information welcomed.
Phil Homer - email@example.com