The entry requirments of 5 GCSE's, including maths, english and a science and 2 A-levels of you choice are the same in all the forces. The medical requirements are slightly less stringent (eyesight and any history of hayfever etc.). And you have until your 26th birthday to be at Dartmouth.
Probably worth going for at the moment because a fair share of the 150 JSF will be headin the dark blues way (assuming FW is what you fancy). However be prepared to be a rotary pilot if you do apply, as it is mainly a rotary force. I have also heard someone in recruiting mention that they are 'desperate' for aircrew (pilots and observers). You only need to look at some of Si Click's recent posts on this forum to realise that.
Good luck.
Mac