A-level Grades

I am currently in Year 13 and take 4 A-levels (Maths, Computer Science, Physics, and Further Maths). I am confident with 3 of my subjects however I'm currently struggling with Further Maths (Current grade C/D). I was wondering if universities would see an A*AAC any different to an A*AA? I am planning to apply to Uni of Bath but on their website they don't seem to mention it. They only say A*AA is required.