Barquentine, my mother had free carers, not NHS but I'd need to check where they came from. They weren't regular in their times though so not much help if that's what you need.
As for medication. We got an expensive but free to us (again will check where from) pill dispenser. My brother or I would fill it weekly and set the timer to buzz and compartments open for my mum to take the pills. I don't know whether this would suit your mother-in-law....would she be able to use it to take her medication regularly?