Ruthless,
from experience of failing a first and second series by 1 mark (74%) You can ask the CAA to remark your paper (£21 for the privilage!) and they will sit down and manually remark it and then give you a mark. Usually it does not change. The CGI at my school has said that in his experience he has never known of the CAA changing marks after a remark. There has been one occasion where they did grant a candidate an extra sitting and this was only because they took ill in the examination room.
Once you have failed an exam after a fourth attempt you have to attend groundschool for 2 weeks retraining. Then you can re apply to take the exams again.
Hope this helps
Cheers
3Legs
