Thanks for all the replies! I think I'll give gliding a go and see how I get on. Powered flying is still very tempting but a ppl will set me back approx £10k then at least £1300 a year to keep it current. (12 flying hours)
From all that I've read a glider is a far more comfortable and enjoyable ride that most light aircraft out there anyway.
And if it's good enough for Sully...!