Just FYI, Cambridge put a big preference to A levels, like others have said, but moreso on your UCAS personal statement and a subsequent interview. My cousin, straight As and A*s. Had an amazing personal statement which got her an interview (whereas my friend, who had more A*s) didn't get an interview at all...likely because of the personal statement.
My cousin wasn't accepted in the end, after two interviews. But she said that, come her second interview, she had decided that the university wasn't for her...which they may well have sensed.