They are rather nice diagrams-sadly they were a couple of images I got from somebody on here, but the thread disappeared after that big outage. The canvas is/was part of a command post conversion kit I've got (or to be more accurate 3 large packing cases of ). It contained the benches, seats, map boards etc to fit in the 434 series vehicle (whichever one it was) to convert it to the command post role. I just need space for a 43* now to fit them in. As well as the missing poles-I've got a pipe dream of using both tents together, as a 224 square foot palace for Beltring.
As for the repair trailer, the there are 2 different end section types (left and right hand) but I can't remember about the roof sections. (it's raining here). There should also be a panel that covers the side of the trailer, that goes over the wheel arch etc! Mine are almost a deep bronze green colour, and made of that plastic impregnated type canvas! (all early 70's dated though, so possibly a later improvement!)