Am I disadvantaged with my current A-level choice for computer science.Watch
I was thinking about maybe switching from biology to physics?
Do you know of anyone who has gotten into oxbridge CS with this combination?
Including Mathematics, with A* in Mathematics, Further Mathematics or Computing/Computer Science. Those taking Further Mathematics A-level or AS-level are expected to achieve at least Grade A. Excluding General Studies (if taken).
No mention of Physics, need to do well at Maths
Unless they specifically require Physics (Oxford doesn't), you'll be fine. Good luck.