U563. I can only speak for Leuchars Flying Club. Our rules are currently serving or retired reg, reservist, RAF, RN, Army. UAS members welcome as they bring our average age down a bit!
We'd welcome OOA too. If you wanted to get a chunk of flying in cheap, a fab holiday flying around Scotland, or a bit of instruction, we could accomodate you. Island hopping in the Orkneys or a West Coast tour have all been done in our aircraft. I can brief on most of the Scottish light aircraft strips and Perth is 20 mins for practicing grass field (in the summer).
I'd like us to start microlighting too, though probably only at weekends due to the sharp pointy things during the week....