The question of "exam slips" came up on the parents' Forum. It's very helpful to be able to give the examiner a slip of paper listing your exam pieces in order. If you haven't got a copy of the printed syllabus (free from music shops) I expect you can find it on the exam board's Web site (haven't checked). That will enable you to list the pieces under their A, B, C headings, and exactly as they appear in the syllabus, to make it as easy as possible for the examiner to identify them.
I started getting the candidates I accompany to fill in a slip once I realised what a time-waster it could be in the exam if the examiner had to get the info verbally from the candidate. Half of them couldn't even say who the composers were without looking, and sometimes it's not obvious from the page where the piece appears. My prepared slips have a place for the candidate's name, instrument and grade, then columns for the number of the piece in each list, the composer's name and the title, e.g. List A No.1 Bach Allegro. It's in all our interests to have the exams running well to time.
I think it's best to list the pieces in their A B C order, but that doesn't mean you have to play them in that order. Just tell the examiner what order you want to play them in. Bear in mind that you can do the various tests in any order you like, but accompanists are only allowed to be in the room while they are playing. If you choose to play e.g. your scales first the accompanist will have to lurk outside until you have finished them!