In addition to what BoeingProp said consider how you are going to save for a deposit for a house seeing as the 100% mortgage is a thing of history nowadays, and how having such large loans may impact your credit rating, and therefore your ability to borrow for a mortgage or anything else that you might think you need (or just 'want'). If you don't believe me then go and talk to your parent's bank manager or an Independent Financial Advisor.
If you want to go to university then add about £50k to your planned borrowing.
If you really want to be a pilot think hard about it. It is a good job, but is a really tough career. If you really want to be a pilot do a good degree, join the UAS, fly a lot, get a great job away from aviation, consider getting a PPL, and flying a Pitts doing aeros at the weekend.
If you want to be a heavy machinery operator learn to drive an HGV and a JCB. You will not do quite so many early morning, and late nights, and you won't have stupid amounts of money crippling you for half your working life, and you can go and do loop-the-loops at the weekend. If you really want to be a pilot operating an A320 is not where it's at, chucking a light aerobatic aeroplane around the skies is.
If you are still committed to becoming a pilot in commercial aviation then get in touch with The Guild of Air Pilots and Air Navigators
GAPAN - The Guild of Air Pilots & Air Navigators next year and try for a scholarship for a PPL. This is about the last organisation, apart from the military, who will give a fully funded course. As such it is very competitive, but if you get the course your CV will have a bit of gloss on it that will help you to get started.
Good luck with what ever you decide.