I think most people who become pilots have or are capable of getting a degree.
I don't see many people asking for formal qualifications in the job sections, but I'd imagine at the interview stage they'd see how well spoken you are and what your English is like.
As for the Maths and Physics, If your good enough to understand and pass all ATPL exams then that would mean you're capable of getting a decent A level grade.
I think a lot of people like myself have back up plans incase something goes pear shaped and it will also gain me a job with a good salary (which in turn pays for my flight training) I am a web/applications developer & web designer so if I don't make it as a pilot I can just become a contractor and earn £250 to £500 per day doing what I do now sitting at a desk 9-5.
Having a list of good grades and a couple of letters after you name would keep you in the better half of the CV's for sure.
Good luck
