Thanks, that's useful to know.
Yes, bridged SSIDs are not ideal, they have been used historically to put devices that need access to certain local resources on a particular LAN. Due to the federated nature of the university there are many LANs that are beyond our control so it has been a quick-fix for a number of years. It is something we are definitely looking to phase out over time as the capability becomes available (eg utilising some of the capabilities of ClearPass) .