Not quite an exact match for the British uniform you seek -

Poserworld - http://www.poserworld.com
RAF Desert set -  Pants, Shirt and Beret, originally created as a 100% authentic RAF desert uniform from the 1st Gulf war or a general UK uniform. For M3, Apollo, David, James, and Stephanie3. Other uniforms also - for M1 & M2, P4 Male, others

It is a subscription site, but they do have DVDs of 10 years of poserworld material

Not affiliated with Poserworld - just a satisfied customer (100s of DLs)

Also appreciate the models you've created, Anthony, Thanks for making them available to the community. Created textures for many of your characters, but lost them all to a machine crash last year. Currently only have redone a mediochre texture for blankwoman.