Just two points really... Firstly, don't bother going to Medlink , its a complete waste of time and money. And secondly, do you have time for a social life at all? I know that if I was doing six subjects when I was in AS/A2 year I would've struggled to get a good balance. Universities like a well-rounded applicant, and I'm concerned that with all this work you'll have become somewhat of an academic, and will lack the time to enjoy yourself and see friends. I know people who were rejected by medical schools because they did too much, and hence didn't spend a lot of time with friends, or doing other stuff