The fitting of closers on the outside of doors was required by a client to prevent ligature attachment points within the room and, as said it certainly makes confirmation of their presence, or lack of, a lot easier.
Visiting a sheltered housing block, for the first time a while back, I noticed that closers appeared to have been fitted but were now missing. The ensuing discussion with the occupier, and the inspection of the rest of the building, led to the discovery that it was a concious decision by her and several other occupiers to remove the closers due to the difficulty of opening the doors.
This was covered in detail in the FRA report and some resident engagement took place-my head is still hurting from contact with various walls.