Yes you can, the only requirements that you need are A-level maths. Computer science isn't a requirement and people do get in without it. In 1st year they will go over some of the aspects that would be in A-level computer science, so I would get a bit of programming experience before you go, just to familiarise yourself if you haven't programmed before. It would be better if you had full A-level to demonstrate your passion for the subject, but you can get in without it.