Crab
I think you'll find the Mod has pushed the bidders to Mil registration as the IPT have stated that military crews will not be licensed. Something to do with colour of grass!
The CAA will accept NVG etc and are quite happy to go down the state aircraft route but they will not go against JAR OPS (rules) and EASA ( come 2012 - law) and allow you to use the old 'rule 26 - mil aircrew flying civvy machines to carry out their duty'.