The Trinity Rock & Pop guitar grades are based on commercial songs that you would probably recognise. This is normally more enjoyable than playing songs that you haven't heard before and helps you a lot when working towards your exam.
All of the Rock & Pop exams are fully accredited by the Office of Qualifications and Examinations Regulation (Ofqual) in England, and its respective partners in Wales and Northern Ireland. UCAS points for entry to UK higher education are available at Grades 6-8 and various arrangements are in place with education authorities worldwide.