Advice: You don't need A levels to get a PPL, CPL/IR, ATPL, you don't even need GCSE's. It's not a pre-requesit.
The truth is, it will probably help a great deal though, especially for the Mathematics and Science theory. As for getting a job, well maybe extra things on your CV will be noticed, otherwise that's down to how adaptive you are in the interview. If your not good at talking, maybe extra qualifications will help.