Chloe, i'm pretty sure I've got an "Applying to medical school" type book going spare at my parents house, I'm there tomorrow, if I have I'm happy to send it to you for free if you want it, it might as well not go to waste. Not fully in date though as a few years old so not sure if it has things like ukcat in, but the general geist of advice is still useful.
(I also massively recommend trust me I'm a junior doctor by Max Pemberton like someone else said, but I love that too much to give away I'm afraid :P)