If I were you, I'd try and get as many exams out of the way as possible before 1st September when the syllabus changes, bringing it from 7 exams up to 9, this is because Air Law & Operational Procedures becomes two seperate exams (it's only one at the minute) as does Flight Performance & Planning (hint: get these done first before they split it into two exams!). Also, after this date, you only have 6 sittings to pass all 9 exams, where a sitting is 10 days long, and you may only attempt each exam once in that 10 days (confusing, right?!).
I've just passed Air Law & Flight Performance & Planning, almost ready for Nav. exam as you need to pass Flight Performance & Planning and Nav before 1st September in order not to resit either of them to the new syllabus. It might be a good idea to invest in a PPL Confuser and the Oxford Aviation Training CDs, these have helped me massively so far.
The Information Notice about the changes coming in September can be found
here and includes the new syllabus after 1st September, good luck!