Advice I was given before I started my course s the same tell people now. Save your money until you start. Most university libraries are well stocked and books can be very expensive. With physiology texts, quite often people find different books suit them, the library is ideal to do a test drive of books before spending money on one. Most unions offer a dictionary as part of their goody bag when recruiting in freshers week, and the RC has a library you can access and will even lend books out via courier (for a small fee).
However, if you want to look at stuff,
Ross and Wilson is a popular A&P text, but there are others (I didn't like it):
https://www.amazon.co.uk/Books-Elaine-Marieb-Katja-Hoehn/s?ie=UTF8&page=1&rh=n%3A266239%2Cp_27%3AElaine%20Marieb%20Katja%20Hoehnhttps://www.amazon.co.uk/Fundamentals-Anatomy-Physiology-Frederic-Martini/dp/0321709330These are both authors I've used for a course I'm on at the moment
For pathophysiology I really like McCance et al:
https://www.amazon.co.uk/Pathophysiology-Biologic-Disease-Adults-Children/dp/0323088546/ref=dp_ob_title_bkAs wbnurse has said, the Marsden Manual is great for reading up on clinical skills, however, some places will have their own procedures which may differ slightly. There are loads of study skills books and drug calc books, wouldn't know which are best with those as it's been quite a while since I've needed to use one.