Definitely go low key on the fragrance Tom. Some Trumpers Limes or similar barbershop on unexposed areas would be as far as I would go. Swansea is um.......not Cardiff with its new found interest in culture. For dress, I don't know the exact culture at the university but I would look smart but not overdo it. maybe a good off the peg suit?
The Gower Peninsula just a few miles up the coast was the first designated area of outstanding natural beauty in the UK and may compensate for the um....functional appearance of Swansea.
Good luck, when is the interview?