Hi Alex,
My name is Tony Edge and I am an engineer in the RAF and active diver. I have just got back from the Thistlegorm diving with Paul Colley. After a trip out there last year, he mentioned your research and I found this forum with lots of information that helped me identify the Pundit Light, WOT trucks, Bedfords OYs, Morris CS8s and The Crossley Q. The latter was particularly interesting to me as my father had recently passed away and he had been an apprentice at Crossleys before the war (questions I should have asked when I had the chance :-(). I dived the wreck this year with the aim of trying to identify more cargo. The image below is not taken by me but shows one of the vehicles I am interested to identify. On the back are 4 pillars that seem to have chains and sprockets. Does anyone recognise it. I have become increasingly convinced that the majority of cargo in the front of the Thistlegorm was destined for the RAF so has become even more interesting to me.
My buddy was interested in the motorbikes and has identified at least on Matchless. Between us we tried to video the cargo with the aim of producing a 3D model of the cargo. The quality is not up to your standard but may be of interest to the group. I will post a link to YouTube once we have put some videos together.
Tony Edge