Putting a property in to trust may not protect it from nursing home fees at all. It could be seen as deliberate deprivation - It is yet to be tested in the court.
And there are no time limits for determining whether a person has deliberately deprived himself of his assets - if it can be shown this is the case, your father will be treated as if he still owns it.
But it could well be that you, me and every other tax payer in the country will have to pay to keep your father in a nursing home.