Paul,
I am in a similar situation to you and not much older (22). I too was all set for the RAF, got a scholarship under my belt, but then grew too much.
All ready for the airlines then Sept 11th. It happens, but like they say, you do need something to fall back on. I am working in the city and finishing my PPL next year. Then onwards and upwards.
Have you had any lessons at all? If not get some. Also, get your Class 1 as without it you are pissing into the wind.
Listen to what these guys say, it makes sense. If you have got a dream follow it and I wish you luck, but take any free advice you can get. Whether you listen or not is up to you.
All the best
