Would you recommend I do AS Physics for the BMAT?

Hello all,

I have just started college and have enrolled in Biology, Chemistry, Physics, Maths and English Literature at AS level. I am hoping to go to an Oxbridge university to study Medicine, however, as I understand it you are required to get a result in a preliminary exam known as the BMAT. Although the BMAT website suggests that the Physics content of the paper is up to GCSE level, would you recommend I continue with AS Physics? At the moment I am only taking it for the purpose of the BMAT as I heard some of the content is actually AS level to some degree. On the other hand, I fear the work load will build up too much with me taking AS Physics. Thanks very much.