i think that there is a viva of sorts but i'm not sure. my exam will be next december probably so i will start seriously working on it after march, when i finish my school final exams. i'll check out these things thoroughly then. if your's is soon, then try contacting the trinity board by email. they replied to my query the last time. the programme notes thing is always the catch, imo.
i think that for the recital you have to select 4 pieces. i think 2 are judged out of 30 marks and the other 2 out of 15 (or 25,25,20,20). but you need 4 pieces. which ones have u chosen?