Not sure how clear I was as they don't award grades as such for Masters, but it was read out as 'awarded with distinction', 'awarded with merit' or ‘awarded’. So broadly equivalent to First, 2:1 and 2:2 – though with fewer getting the higher levels than at under-graduate.
The 6 PhDs graduating had the title of their theses read out which we thought was a really nice touch (even if I didn’t understand them).
One ceremony, whole cohort @RampantIvy, I guess it's small because it's very much a specialist university – DD2 would highly recommend it though if your DD is thinking of more studying in the future.