Thanks for all the replies and PMs so far - especially BEagle for not biting. Good work!
I was worried about the keep current bit, as I am in a ground tour! However careful inspection of LASORS (right riveting read) reveals that all you need (in my FJ, >2000hrs case) is 12 hours in the last 12 months (mil or civ) of which 6 needs to be PIC. So even if I dont fly again, my IR will cover most of that - I probably just need to do a few PIC hours on something cheap. Also need a flight with a civ or mil instructor (IR) and 12 take-offs and landings. So worst case a couple of hundred more quid.
Also found that you can use SLCs to do the exams - even if you have used the resettlement grant for the GS. Also you get 7 travel warrants.
Interesting comment on pilot recruitment, Beagle. Obviously the market is very bouyant at the moment - are you confident that it will remain so for another 2 years? I believe both BA and Virgin have pretty much stopped recruitment for the time being?