Hello
I just wanted to pop back say thank you to all who sent PMs and posted advice. Things have moved on, and - long story short - MIL moved into a nursing home yesterday.
The main issue seems to have been the medical / physio / OT team / council / social workers making a total arse-up of the communication between each other and with the family.
At the hospital we had multiple nurses giving conflicting information to FIL, SIL and DH when they called or visited. Add the physio team, the OT and her assistant, the ever-elusive consultant Dr and the here-today-gone-tomorrow social workers into the mix and it became impossible to manage - especially as we were limited to one visitor (FIL - a very unreliable witness!) and phone calls. That's 11 different people to ask about MIL - and no clear idea as to who is in charge of what. At one point weeks before, some random woman turned up at FILs flat to "measure up for the equipment". No one can tell us who sent her, or what prompted her visit - nor why a whole bunch of lifting equipment including a Steady Sarah and a toilet hoist thing is now cluttering up FILs tiny flat! This all happened long before they were even talking about discharging MIL.
DH spent pretty much three full days phoning and insisting on speaking directly to everyone to get the full story. No one could tell him who was actually the "discharge coordinator" or "discharge nurse" for MIL. It appears that they are not following normal procedures just now due to Covid - there are no big meetings etc. The consultant told him that the hospital doesn't actually make recommendations about future care - while, at the same time, the nurses were telling FIL that she was likely to need to go to a nursing home - which was the line we were all heading down. At some point though, the physio randomly decided that as her mobility was improving slightly she might be able to go home - but she didn't tell anyone about this, not the Dr, nurses, or family: she just added a note to MILs file, which popped up as SIL was sitting with the temp SW talking about nursing homes!
It didn't help that the original SW was assigned to her on a Friday - then he went on holiday for a week the next day and left it to a temp replacement to deal with - and the replacement just went off down the home care package route due to seeing the physio's update but not actually talking to anyone else about it, including family. Nightmare!!!!
The upshot was that the original SW returned from his holiday, got the full story from SIL and took charge. He went to the hospital to see MIL in person and assess her, to ask what she wanted (and to confirm that she doesn't have capacity). He consulted properly with SIL and FIL. FIL, to his enormous credit, was able to say that he cannot have MIL moving back home, even though he wants to. He can see she won't be safe, and that she needs a level of care that he can't provide, even with a full care package. He really pulled himself together to do this, with full support from DH and SIL. The SW agreed, having seen MIL. Between them, they managed to find a place in one of the closest homes to FIL, she moved in this week and fingers crossed it all works out (DH and I are still holding back on the celebrations for now, as the finances still haven't been nailed down completely - it all seems to have been just too smooth ;-)).
Anyway, thanks again for all the help and I hope all my blurb helps anyone else who is battling with the system atm.