hello
@Maeny
a warm welcome to DTP
I am surprised tha LA organised night time care, I guess they did it as your nan is self-funding
but if her capacity is in question and she has not granted LPAs then I think you are right to carefully consider how her fees are paid
strictly, someone should now apply to become her Deputy
www.gov.uk/become-deputy/apply-deputy
unless your family honestly feel she has enough capacity to grasp that LPAs will give her Attorneys permission to help her and agrees at the time of signing (though if she's refused before, that may be an issue)
www.gov.uk/power-of-attorney
if she can grant third party access, that may help ... and look into DWP appointeeship
Apply to become an appointee for someone claiming benefits - how to apply, stop being an appointee
www.gov.uk
The LA should have carried out a financial assessment after the assessment of her care needs, to check how close her finances are to the threasholds where the LA step in to contribute ... it's highly unlikely they will contribute to night care at home
personally, I think your dad needs to make clear to the LA that he has no legal authority to pay his mother's care fees and they must wait until either she herself agrees to payments being organised or for Deputyship ... but don't let them take on Deputyship as then a professional Deputy will be appointed