AlphaMale - You can sit an exam every day if you want to. It's up to yu. You just ahve to do them at a CAA approved test centre. I'm doing all of my training through Cabair at Bournemouth who are approved to sit these exams so will be doing them there.
Hope this helps and good luck! Where abouts are you in the UK? If anywhere near Bournemouth it could be an idea to meet up and study together. As I said, my books arrived yesterday and I'm thinking theres alot to cram in!
CS
