If you're was interally marked, He should be fine. Schools have to keep work up to 3 years in case the exam boards request it, however, it was 3 years ago, and you school can say they have gotten rid of it. If you had both went to the same school, there's bound to be a small number of teachers who teach A2 ICT anyway, and coursework would normally have to be marked and checked by 2 teachers if its internally, and someone would have pulled him up about it by now if it were a problem...