Hello, I also live in Luton, and I fly from RAF Halton (near Aylesbury), where I did my PPL training in 2009.
They also have a microlite club with 2x Eurostars and 2x Thrusters. The aeroplane club has 3x C152's, a PA28, a Citabria and an
Aquilla, all available to train in.
Halton is about 20 miles from Luton and about 40 minutes drive.
They *do* accept civilian members, and are one of the cheapest places around - and no home landing fees
If you'd like more info or to join me on a flight sometime, PM me.
Alan.