Further to Blues comments, it's worth noting how the NHS are very pithy when it comes to LPA.
"Generally, professionals will make decisions about your health and social care, and your family or carers will decide on day-to-day matters.
If you wish, you can officially appoint someone you trust to make decisions for you. This is called making a lasting power of attorney (LPA).
Yep, when it comes to life and death decisions for your loved ones, remove the professional and replace with the window cleaner.
https://www.nhs.uk/conditions/end-of-life-care/lasting-power-of-attorney/#:~:text=If you wish, you can,a health and welfare LPA.