Firstly, a person deemed as vulnerable CAN be taken into care against their wishes, if they lack mental capacity, for their own sake or to protect others. Secondly, an Attorney (the daughter) is obliged to act in the best interests of the person for who she has the PoA, and not for herself. If she goes against the advice of professionals involved, then the Court of Protection could get involved. She can resign as Attorney, but, if there is no other Attorney named, then the Office of the Public Guardian will take over, and it will be VERY expensive. Being an Attorney for someone means you need to handle their affairs (either Health and Welfare or Property and Affairs, or usually both) but it doesn't mean that you actually have to physically look after them. You say there are no other relatives, but can someone give the daughter a bit of support to carry on her duties as Attorney? If not, then approach the local Carers' Association or the Alzheimer's Society (if dementia is the problem) to find a way through this sad situation. Having had PoA for late husband, and now for father, I know it can be very time-consuming and onerous, quite apart from the emotional component. Good luck!