It totally depends on what modules you do, you have pretty limited calculus from GCSE and the later mechanics modules rely heavily on that for some questions.
And thats stuff that you are likely to learn in C3 and C4 ie next year in normal maths, so you need to be careful which modules you take, if you get a choice!!
I didnt get a choice which meant that we had to have a 2 week crash course in all c3+c4 calculus in order to complete M2