What to wear to a meeting with an admissions tutor at a university?

Okkk, tomorrow I have a meeting at the university I want to go to with the sociology admissions tutor because I couldnt attend the open day. I emailed them to arrange it but feel this is my chance to make a good impression. Problem is, I have NO idea what to wear. Should I dress smart? Smart casual? Theres no interview or anything, just a chat& tour ect. Also the weather has been gorgeous (around 28 degrees) set to be the same tomorrow. Help is appriciated.