Plenty of information on the website:
www.royalnavy.mod.uk
Plenty of careers offices - again, see the careers section of the above.
Very recent PPrune thread:
http://www.pprune.org/forums/showthr...hreadid=122133
I'm applying for both the RN and RAF at present.
I highly recommend you learn lots about the RN before you go for an initial interview.
For example, not just about the FAA, but also the surface and submarine fleets.
A PPruner called Rusty Cessna has asked many of the questions before, search for him using the PPrune search engine.
Best of luck
Stonca