Goater
All depends on which area you want to be involved with. Do you want to go into airport type management job, or work for an airline. First option is not my area, but second is. Also, are you prepared to move far, or stay in the london airport areas, as these things will affect your options.
Just so you know, I came from the same background, same airfields working with big jets before I decided to work for a living
. Now working as a flight dispatcher in the land of cheese and chocolate. There are ways to get the US licence if you have the relevent experience behind you, and get it paid for too.
If this is what you are interested in, let me know and I'll try and give more info, or PM me if you want. Oh, and get lots of time on Jetplan, it really helps.
Expat