Physics vs Bio for Computer Science?

I'm interested both in biochemistry and computer science, and will do one of those topics in university. I know they are very different subjects, but I genuinely dont know which one I want to do... Right now, im thinking of doing further maths, maths, bio, chem. Our school doesnt offer computer science in a levels. I've heard that a lot of computer science students pick physics instead of bio in this combination.

If the university page doesn't say physics is recommended or helpful, but only that the vast majority of applicants have taken it, am I at a disadvantage in not taking physics?