A friend made the same jump out of the Navy, it took about 6 months at QQ to change his mind and he rejoined. The only prob may be that all the RAF chaps around my purple place of work have been told that the RAF Eng Branch is overmanned and needs to shrink. Not sure how that fits with all the gaps but it came from a 2* so it must be true.
All the jobs going to BAE/RR?