I never got the Britain's military one you have there but I have a lovely blue one with a matching horsebox on the back. Has the name of a stables on the side I think. Edit, Just remembered it, Pine Lodge stables.
Seem to remember they did a black and white zebra striped one too.
The model I always remember as a kid though was the one below made by Polistil. It's a 1/24 scale 109 series III and my dad had one sitting on the shelf as a display model. Being a kid of course, I was fascinated with it and took it off the shelf whenever I could. Gradually bits fell off the roof rack, the mirrors came off, steps got broken etc then the stickers started to peel so I pulled them off!
A couple of years ago I was looking on ebay for something completely different and one of these still in the box popped up as "you may also be interested in...."
I grabbed it while I could and now it sits on my shelf. Think I paid about £30 but well worth it I thought.
Dad was very happy to see it too when I showed him as he remembered it well.
Craig.