I will be sure to email them, but it does sound like the maths route may be more suited.
I have also looked into the oxford course and do actually think that it is probably more suited to me. The reason why I was looking more to cambridge probably sounds silly, but they don't have an entry exam. It isn't because I'm scared to sit the exam, but my school hardly has a record of Oxbridge applicants (none in my experience) and it just seems like a lot of fuss that would mean actually talking to my teachers (something I don't do often).
I'm not actually set on even applying to Cambridge or Oxford, I'd much rather go to St Andrews (which would mean no tuition fees). I am just looking in to it at the moment.
Thank you very much for the advice though, it has been very informative