Ok, my DP is off with stress right now. He wants to go back to work, but has already had a failed phased return to work. Failed because he WFH, but is ND so hyper focused well beyond the hours he was meant to do, and ended up burning out again. Is now stuck in a burnout cycle. He will drop to half pay soon.
He has a lot going on outside of work too, so having the time away from work means he has one less demand.
He has not had "endless" sick notes from his GP. Had to see his GP for the first one.. and a MH nurse for others. They have sent him on an anxiety course (not helpful), and when they found out he was autistic, actually asked if he could read and write. He is post grad educated.
He has seen OH etc, but I am not sure what else they can do beyond WFH and certain hours as a reasonable adjustment.