A gamble
Hello Hazel, sorry the skies are looking grey again. This is what I think. Depending on your view of the care that he is receiving in hospital, John may be better off in the nursing home. However, if you think that the hospital is playing its part to the full, and the surroundings are not too distracting, and you can reach it quickly, then hospital would be as good as the NH. My experience of hospital , for my mum, was that it was noisy, confusing and unreliable.
Nursing homes are by no means perfect either, but the more tranquil surroundings, (and more homely atmosphere) makes it more likely that John will calm down, I think. This advice reverses if the NH is more difficult for you to access. The thing that goes most in John's favour is how easy it is for you to play a role in his care. ( I don't mean 24/7 of course, but reasonably frequent and allowing yourself enough time to recover and relax betweeen visits.) It's a gamble whatever course is chosen, but the best you can do for John is to look after yourself and keep yourself rested enough to put in whatever you need to do when the time comes.
If this is a move for John that looks longterm, try and think of yourself and not run yourself into a frazzle. The NH will give you some peace of mind, especially if you can get over there to keep a watchful eye on things without travelling the length of Scotland to do it. The NH is not the end of the world, but it may indeed be the beginning of a new chapter. PS, my mum has been in her nursing home for exactly a year this weekend during which time her weight has gone up and down. In the last month she put on 4kgs and although she HAS deteriorated, it's been a quite slow decline and she still has many flashes of humour, and understanding and intelligent response.
Think of this period as a 'storm at sea'. Sometimes all you can do is ride the waves, until the climate changes.
Good luck for the coming week, Love Deborah xx