I have no advice for the original poster other than to seek out a good solicitor and/or accountant for advice.
I would like to join the debate re payment for care of people with dementia. We, as a society, accept that the care of murderers, rapists and thugs in our gaols are tax payer funded. We accept that long term care of those with often self-inflicted illnesses related to obesity, smoking, narcotics, alcohol, etc., is funded by the tax payer. We rightly accept that those with other long term illnesses such as multiple schlerosis, parkinsons, cancer, etc., have their care funded by tax payers. Disabled people, often requiring tax payer funded care from cradle to grave are rightly looked after without complaint from us. So why on earth do we expect people who, through no fault of their own, become victims of dementia, to fund their own care if they have lived frugal lives, paid their mortgage and saved their money.
I would also add that, as dementia is most often a disease of the elderly, these are the very people who have paid the taxes that fund everyone else.
We must fight for a fairer system, dementia is an illness.