Patrick, regarding the Aveling Barford, as we all know, AB didn't build their own engines, they were made by Dorman. My question is, was the engine depicted actually labeled Aveling Barford? It's some years now since we had one on the place, so I can't recall the badging information.
The engines we had were in the Calf Dozer. This model was also fitted to AB trenchers and, I believe, small road rollers.
Eric