Nudity in performance UK?

Hi, I’m on a contemporary performance degree, and i’m planning a show that involves filmed erotica/porn. i can find plenty of resources about the legalities of filming this on set, but very little about the legality of showing this to an audience at a university. aside from making it 18+, does anyone know of any other laws or resources i should be aware of? as i said, i’m england. thank you!