Many thanks for the further replies.
Gary, after getting a phone message back from Remap, I’ve now made a full written submission [with photos] via their website.
Mike, Mencap is one of the few potentially relevant organisations I‘ve not investigated, so thanks for that suggestion.
FF, some good ideas there. One thing I can’t quite make out from all the info at your second link is what is meant to be taking the weight of the hoist and patient. A floor joist? Something else?
Hopper, what you say is sound common sense. I’ve sent you a pm.