Hi Jake,
After reading your post I don't believe anybody will be able to add much more to what you have planned thus far. Your subjects seem to be good to me. Start your Flight Training and keep rattling away at your Studies as you plan to do.
Regarding your Language GCSE, I would pick German instead of French as this will open another door down the line if you were interested in the Lufthansa Pilot Scheme.
Regarding Scholarships, the Guild of Air Pilots might be of interest to you. They provide Scholarships for the PPL but you need to be 17 Years of age to apply. Not sure about the Gliding.
Flying Scholarships - GAPAN
Might see you around Newtownards some day.