You might want to get the biennial flight review (BFR) done in the UK before you go. Could save a bit of hassle. (The BFR is a one-hour checkride and one-hour ground school session which all FAA pilots must do every two years. Even if you have a certificate issued on the basis of a CAA/JAA licence you must still do it.)
[ 15 January 2002: Message edited by: Capt PPRuNe ]</p>