I don't think KS was ever listed on BU's GMC reg. Her relation to him was supervisor whilst he was on a one year 'fellowship' placement for junior doctors, which is a fairly common scheme by which doctors can be employed on a staff grade, and be affilliated with a university, at a time usually early in their career before they decide whether to undertake specialist training, or settle into a more permanent staff grade role in any particular department.
I think they would have wanted anonymity for KS because she is the lead clinician who promotes and provides induction and manages the placement of around 30 fellowship doctors every year. It will have been an absolute nightmare of a task filling those places and preparing for a 1 August induction fortnight for junior doctors who will have followed the entire case and know what an absolute hash she made of that situation. Whichever side you support, her rash intervention only made things worse.
The most recent Case management note that includes the woitness list has Beth Upton's work address as St Margaret Hospital, Dunfermline, within Fife Health board. I don't think we know anything about Upton's actual place of work beyond the Fife address for court purposes. Which is probably for the best for minimising disruption to patient care.
I vaguely remember reading that Upton was working in a different hospital and department, around the Feb tribunal dates. But it's quite possible that Fife have supported/encouraged both Sandie and Upton to take as much time off as they need, because with the best will in the world, their presence might bring disruption while the case is ongoing and there is so much divisive interest. We know Sandie has been off with stress, and Upton has needed counselling. Either of them could potentially have wanted to go back to work, but if they wanted time off, sick pay or special leave might be seen as a good use of resources right now, to avoid a further claim later on if the work environment becomes toxic for any reason.