So I am now finalising my UCAS application as I've just got my two referees confirmed. One from the assistant principal at the FE college I was at and the other is a colleague who was an 'unoffical' mentor. Should I list my second referee as a mentor? What other title could I use? Secondly, I just discovered I only have GCSE Biology and Physics at C grade, with my Biology at D grade, will this affect me?