Guy who doesn't come out of his room

i think they knocked once, and then left a note, which he ignored

The others in the flat are mostly freshers imo. They’re probably on their own for the first time and are trying to find their own feet. Someone with MH issues should not be their entire responsibility so shifting part of that burden onto the service that is dedicated to it seems a reasonable reaction and the sensible thing to do. At some point physical integrity becomes more important than someone else being momentarily embarrassed. And as @Admit-One has said any intervention will probably in a first instance be only be someone knocking on his door and asking if everything is OK. He won’t be walking around with a sign on his back for all to see stating that his MH is fragile and the university services are keeping an eye on him. So stating that he’ll probably want to leave uni afterwards is a bit overdramatising. On the contrary he might be pleased that the situation is being handled by the welfare office because he himself didn’t have the confidence to go and find help on his own.

Wellbeing typically use a very 'light touch' approach in the first instance, espeically if there is no immiedate cause to suspect any harm and they have (presumably) been engaging with the academic dept.
We'd almost certainly be talking about them either dropping him an email or giving him a call.
"Y'all okay?"
"Yeah, I just suffer from social anxiety and it's a bit much at the moment."
"No problem, here's some contact points you might find useful."
"Thanks"
Honestly you would think we were talking about tasing him and dragging him to a house party.

The others in the flat are mostly freshers imo. They’re probably on their own for the first time and are trying to find their own feet. Someone with MH issues should not be their entire responsibility so shifting part of that burden onto the service that is dedicated to it seems a reasonable reaction and the sensible thing to do. At some point physical integrity becomes more important than someone else being momentarily embarrassed. And as @Admit-One has said any intervention will probably in a first instance be only be someone knocking on his door and asking if everything is OK. He won’t be walking around with a sign on his back for all to see stating that his MH is fragile and the university services are keeping an eye on him. So stating that he’ll probably want to leave uni afterwards is a bit overdramatising. On the contrary he might be pleased that the situation is being handled by the welfare office because he himself didn’t have the confidence to go and find help on his own.

i agree that its not the freshers responsibility but from my own experience mental health services are the worst and dont help at all and frequently the solution to active suicidal ideation is to pause the students studies regardless of the students wishes and force them out with no support network relying on support to be given by the nhs which never is due to budgets - this is exactly what happened at my 6th form - if you really care check their social media if they have any friends/family they are close too and inform them of the situation as they will care more than a university which often solely cares about its own reputation

I get your point but people who have MH issues are not all alike and their issues may have very different origines. Maybe they don’t want their family involved. Maybe their family is part of the reason they are where they are now. Even Freshers that get on with their flatmates don’t really know each other at the end of September, so asking them to look at social media for someone they have had almost zero contact with may not be the ideal solution either.

Yeah, that's a good point, I know a few people who have MH issues and the worst people to tell would be their family. Not everyone has great parents, or at least understanding parents.