Without wanting to sound rude, it would be complacent of you to quit a levels and just expect to progress through your atpl and land your bum straight in the rhs. Whilst ctc and oaa are good for getting their students jobs i know plenty of people who've gone through the big three and not got jobs for at least a year, some are still looking. You need all the help to find yourself work in that time and need to be prepared for not getting anything at all. If you're that desperate to fly do a ppl alongside studying. But whilst they don't require a levels it's not worth not getting them to save a bit of time when you'd hope to spend your whole career flying. The ctc ezy mpl/atpl do require a levels I believe..