All Universities must allow access to all Assistance Dogs, whether trained by ADUK, ADI, Non-ADUK orgs or charities, or Owner Trained. Refusing access would be breaking the law (Equality Act 2010). I suggest that you educate them about this (court action CAN be taken against them) and hopefully they will comply. Good luck! I run @ProtectOwnerTrainedTeams on Insta and have an Owner Trained AD myself who accompanies me to Uni so feel free to DM me there with any questions about access laws or training or anything else.