Advice re elderly parents and my mum

[Winchester89]

Just wanted to see if anyone had any tips and advice. My grandparents have just moved into sheltered accommodation (finally) so hoping this is point to improve things.
But anyway- my mum is basically their main cater (she has 3 siblings about as useful as a chocolate fire guard - brothers funnily enough) and her sister helps but still works full time.
I try my best to take some of the burden from my mum as it must be so hard but she does everything without complaint. My Grandad rings her constantly about silly things. My Nan has Alzheimer's (has done for approx 3 years now) and he just doesn't get it. He has vascular dementia but generally just does illogical things.
I just want advice what I can do for my mum- or how I can get her to delegate a bit so she's not doing everything. I keep saying- ring me if need to go round for whatever but she never does and then I find out after that she's been 3 times that day because my Nan has had a meltdown. (These have decreased drastically as we have started some ahem drugs- highly recommended)

So yeah- really I just want to help my mum help my grandparents.

Oh just to add my Nan still knows who most people are so we're really lucky in that sense! I robbed a cardi off her last week as she has approx 50 (literally) thinking she wouldn't notice. Turned up wearing it yesterday and after about 20 mins she looked me up and down and said 'Ay! That's mine'

Maybe they could both have a community needs assessment from the council and have carers in once a day, speak to your mum and would the warden be happy to help out a bit with shopping or arranging a carer. If nan is having meltdo2ns would it be helpful for her to have a doctor or dementia nurse home visit.