physics maths english add maths all get A1
then active in co-curricular activities..

with these qualifications u can easily get into their admission tests..
which mostly and usually consist of IQ test, math and physics test, coordination test, interview, etc... pass all and make a remarkable impression during the interview, u'll probably get accepted in their cadet pilot programme...

It is advisable to apply for cadet programs offered by major airlines instead of taking the course privately.

Why?
Well my eldest bro and one of my sis is a pilot. And from my experience and what they have told me, it will be harder to find a job for those who take the course privately because the airlines already have their cadet training programs with cadets bonded to them, so why would they need you? =]