Iain - well done mate, top man!
Jools - welcome aboard, always glad to see new diary'ites!
Off the top of my head (it does seem a while ago now!) the exams are as follows (I'll put them in the order at which I think you should take them - this is just in my opinion tho, others may advise otherwise):
- Air Law
- Meteorology
- Human Performance
- Aircraft Tech / Principles of Flight
- Navigation
- Radio Telephony
I took my RT exam too soon and came out with a rather large headache - I passed it, but would have done it easier had I gained more experience first. Air Law is one that you may find a little dull, but it is important, regardless of what anyone tells you. As you do more flying, you'll be able to relate to the theory a lot more. The above list may also depend on club requirements, so have a good chat with your instructor.
All the best
Maz