I understand that the "student" approach has to go through the university involved, in this case the RVC in London
Not sure that's the case in the UK, you an access the Apple Store for Higher Education when on a JANET internet connection (i.e. on-campus at a UK HE establishment) or can call 0800 039 1010 when off-campus. She could also try pitching up at the Regent Street store with appropriate ID.
See here.