A few for you to investigate:
Air League Flying Scholarships
Air League Flying Bursaries
Caroline Trust (gliding)
GAPAN PPL Scholarships
de Havilland Educational Trust
Light Aircraft Association Foundation Scholarship
Royal Aero Club Trust
Royal Aeronautical Society Centennial Scholarship fund
RAF Association Flying Scholarships
Royal Navy Gliding Scholarships
A quick search on Google should provide the links.
Best of luck, jez