Danny
It's horses for courses. Plenty of pilots out there don't have degrees or A levels. It's all about what you have flown and how many hours you have as Crashdive has already said. If you have not got any do not worry over it. Most airlines who want some form of academic ability run their own (or bought) numeracy and literacy tests. What you need to spend your time on is gaining more flying experience than 'just' a brand new fATPL. That's what will get you noticed and don't forget to network, network network! I don't know of any airlines than demand A levels for direct entry, but plenty ask for them for sponsorship. So you see, it's not worth worrying about, getting head and shoulders above the others in the flying stakes should worry you more.............!
Good luck
PP