I would suggest applying this year just to see whether you get any offer which is tbh not very likely. Applying this year could be a practise run for you, as you would have an idea of what the UKCAT is like, and then if you get any offers you will know what interveiws will be like. Aim to get AAA this year and smash that part of the entry reuirements. If you have no offers due to your predicted being too low you still have your UKCAT, and if you do well enough you will have your 3 As on results day, you can call up some med schools through cleearing but you need to be quick. I know that this year both St Georges and Barts were in clearing for medicine. Even if you dont get in this year you can always take a gap year, get lots of experience, and make your PS incredible. Since you already had your practise year the year before, you will have an idea about what the UKCAT is like and that will be helpful in your gap year when applying again. Gap year students are liked by med schools. Im just gonna say you have to be really passionate to want to do medicine, because alot of the tme students dont get in first time