In Southampton, depends if you do it from econ side or math side. Im not sure about econ but you dont do a lot of maths in the first two (or maybe just the first?) years. But math with actsci, you get a hell lot of math because although you do actsci, the main degree is still math. Im not trying to scare you but im pretty sure people who do math with actsci do maybe only 3 (compulsory) modules that arent math for the whole of your degree because do remember that if you want to get those 8 exemptions you need to do maybe around 8 specialized modules to just complete that exemptions, not including the prereqs. Think of it this way, I do MORSE in Southampton (so not actuarial, we have much wider options than any maths course) and I only do 6 modules that arent math in which 3 of them are compulsory. If youre scared of the maths, i dont recommend doing actuarial. BUT if you quite enjoy maths then act sci is going to be just fine. Even I quite regret not doing actsci now; the course is that good and actsci is really interesting. Sure its horrible but then theres going to be people in the same boat with you so all good.