Sixth Forms In East London?

I'm applying to sixth forms currently however some good schools have already closed their applications (such as LAE). I only started applying now as I was waiting for my year 11 mock grades as they are far better than my previous grades. I am hoping to do maths, physics, computing and one more, however, my maths grade is only a 7 and most schools require an 8 minimum. Am I cooked?
computing - 8
physics - 9
chem - 8
bio - 8
business - 7
history - 8
english - 7 7
maths - 7
I am currently applying for Brampton Manor, NCS and a couple more. I don't know what other schools to apply to which are good.