Not quite true AFAICS: see here, which suggests that for "permanent" nursing home care, if there's no surviving spouse living in the home, "its value can be taken into account" (aka, they can force you to sell it).
BTW, your use of "England" is correct here. I know you know that. But the changes in the UK's governance structures over the last 10-12 years can't have made things much easier for the average American to understand... see also "Lockerbie". :roll:
It looks like these are the new rules coming into effect in October this year so I stand corrected.
The only reason I believe that the rules had changed was because back in 1998 DW's parents signed over the ownership of their house to their 4 children to avoid the value in the home being used in means testing for permanent nursing home care. (BIL is a lawyer specializing in civil law).
MIL died in September last year and FIL in June this year. The house has now been sold and capital gains tax will be due. BIL said that the means testing law had changed since 1998 so they didn't need to have transferred the house. (also, neither of them ended up needing nursing home care).
As you point out, the rules are changing again and I think with any forms of taxation, financial planning based on future tax policy is pretty dicey. If the house had stayed in their name there would be no tax due at all since the total estate is well below the threshold that would trigger any taxes.