Atlantic Airlines don't ask for A - levels for their cadetship unless they've changed it since I knew the dudes there. I went through the Atlantique cadetship without them and survived the training as did a a lot my pals.
Can understand it's an Airline's way of whittling applicants out, but you don't, when it comes down to it need them for the training at all. Anyone who says otherwise is talking poppycock