John,
using everyones desk top spy tool, google streetscape I have had a look at the Staffordshires museum.
There is a collection of MVs and kit outside, as you described. Some kind of sand coloured foreign tracked thing, likely a Gulf War 1 trophy, a Bren gun carrier, a MOBAT, a Ferret, a 432, looks like a Mk1 and some kind of CVRT Spartan.
As far as the Spartan goes I cant quite make out what is on the top on the right side of the vehicle, some kind of box affair.
Does anyone live nearby who could have a look at it?
Thanks John
R