Earlier this year, I got an offer from Oxford for PPE (AAA). I am intereseted in those subjects however, I also have a great interest in Physics and previously thought about getting my undergraduate in Physics. Is there any way that after I get my PPE degree, after a few years, I can apply for MPhil or MASt in Physics at Cambridge? For reference, my A-levels subjects were Physics, History, Mathematics, Economics and English Literature and I am predicted A*'s in all apart from English Literature in which I'm predicted an A. I don't however want to spend an additional 3 years getting another undergraduate degree in Physics(or Natural Sciences) but instead want a shorter alternative. I would however be willing to take a shorter course of 1 year and a half or less.