Nobody requires A-Levels in Maths and Physics specifically, however if you try to gain some A-Levels, especially in the current environment, it is another tick in the box, and transfereable skill if you were to be unsuccessful applying for flying positions. Do not underestimate extra qualifications and the effect they can have on pay, and bear in mind that much of the competition will have the same in terms of flying, but with extra qualifications can prove their aptitude and responsiveness to dealing with large amounts of information and being examinged on it more easily.