Get your eyes away from Oxford and have a look at ALL of the schools.
Lets face the facts, you simply can't afford to go to Oxford... Imagine when your 24, have a missus looking to get yourself a nice car and get a nice house for a future family, do you honestly think a bank is going to give you a car loan or a mortgage with a £70,000 loan on a £20-40k salary?
Even if you were offered a mortgage, how do you fancy being in almost a quarter of a million in debt by your mid twenties?
If you fancy having some money in your career go to the US/South Africa/New Zealand or even the UK and get your PPL then join a local modular school and work your way up. It will cost you half the price, it's flexiable, you can do it when YOU want to, you fly where you want to fly and you can enjoy your future salary a hell of a lot more.