Another option might be an FAA PPL?
They are also valid forever, and my FAA class 2 (commercial) medical cost me just $60!
I am almost certain (someone here will no doubt confirm) that you can use it to fly day VFR in a 'G' reg aircraft IN THE UK. If you wanted to fly further afield, you can hire an 'N' reg aircraft and go where you like!
All the best
Julian
Last edited by julian_storey; 18th December 2006 at 12:42.