This looks like a fun kit. I always liked the Matchbox 1/76 scale version. It has to come with lots of stowage though - which is a good excuse to do some of the specifically British items missing from the current Allied stowage sprue, and maybe improve on your sculpting of soft stowage like blanket rolls. Some suggestions:
- teapot or similar item for brewing up
- British-style pressed steel ammo boxes
- proper British knapsacks
- ration boxes
- generic crates and barrels
The tread patterns and the shape of the tyres aren't correct. The tyres were fatter, and had a diamond tread pattern which was quite distinctive.
Also, it's a small point but the petrol can racks on the running-boards are mis-shapen. For some reason I can't post photos, but the rack was higher and the guard around the top was vertical, not sloping. I think the petrol cans themselves are also underscale in your drawing.