It seems like he just doesn't want to go on, being helpless, unable to look after himself.
And get this. There's an operation he was supposed to have to make him a bit more comfortable. But he would have to have been transferred to Hammersmith from Slough. They never seemed to get round to doing it.
Now he's home, they've started talking about it again, though he doesn't want it. And if he were to have the op, he wouldn't be allowed to go in an ambulance, as he's not in hospital. DP's sis would have to DRIVE him. For over an hour. Through London traffic. In his extreme pain, with all sorts of tubes attached to him. So, that's not happening.