I assume it's meant to represent one of the variants of the CMP 15 cwt truck.
I don't know if they originally had separate canopies, but if so they're long gone. So, I'm adding tilt frames out of copper wire, as on the one on the front-left.
Later on....I've finished the tilt-frames, and made a tilt for one out of Green Stuff.
I found it quite difficult to keep the putty tilt square and sharp, and I think I'll probably have to artificially enhance its geometry with paint. Nevertheless, it's a good enough result for my purposes.
And now for some paint. I'll do them in Caunter, I think.