BombDr,
I did just that last year, left the RN after 16 years (albeit as a Seaking Observer so I had alot of flying experience)
Was offered 3 jobs within a month of leaving and am now in the airline I always wanted, they do appear to like ex forces personnel.
PM me an I will let you know the ins and outs of it all and where in my opinion to train I may also be able to give you some advice ref resettlement / ELCs etc.
Best thing I ever did
Fatobs now an EXfatobs