Your degree classification far outweighs the perceived "prestige" of the University you attend. Really, unless you went to one of the top five or six RG Universities such as Oxbridge or LSE, then it won't make much difference. The only exception to that principle is if you interview for a firm and the members of the interview panel attended the same Uni as yourself, in which case you might score some loyalty points but that is equally applicable to a non-RG Uni. Some RG students like to pretend to themselves that it is going to be a golden ticket to a great career, which is fair enough if it helps them cope with the stresses inherent to such a competitive industry but such an idea is actually pretty redundant in the real world.