Thanks so much for all the advice. We've finally got a carer starting tomorrow, only two hours a week at the moment, but I'm hoping this will be the first step towards more support in future. I'm praying the visit goes well and mum likes the carer.
Part of the problem is that I have no contact with her GP. I've written to them a few times to express concerns, and I think that's perhaps triggered interventions, but they're not able to contact me back. I've tried to persuade dad to let me come to an appointment, but he doesn't see the need, because he thinks he's got it covered - which used to be true, but he's now increasingly forgetful and less able to grasp what's being said, so I have a limited picture of what's going on. For example, I know mum was previously on anti anxiety meds (but now isn't), and the doctor keeps putting her on and off Zopiclone for sleep problems, and it looks like mum was prescribed Donepezil but not on a repeat prescription, so she's now off it again.
It's just so hard trying to help from a distance. If I was there regularly I could try to implement calming routines in the evening, and I might eventually wear dad down about accompanying mum to the GP, but I live a couple of hours away and have a very inflexible full time job, so it's really difficult. I'm currently trying to suggest that I dial in to a GP appointment remotely, but dad doesn't seem terribly keen.
@nearlyemptynes i hear you. Mum has basically no quality of life now. If I heard tomorrow that she'd passed peacefully in her sleep, I would think it a blessing. Like your dad, she's also become much more affectionate - we were never a huggy family at all, but now she seems to crave that physical affection. Hearing her shout and swear is horrible, but the very worst was just seeing her sob. I've probably only seen her cry a couple of times in my life, and never like that, and I found it very hard.
My next step I think is to phone the care agency after the visit, so I know they've got my contact details, and I can give them a bit of context on the situation. I might try the Alzheimers helpline, too