The rules for HMRC and Inheritance Tax and Local Authority for long term care funding needs are entirely different. Don’t fall in to the trap of trying to combine them. If you don’t come clean to either you may get away with it but if you get caught out it’s a criminal offence in both cases. If you defraud the Local Authority they are more likely to prosecute as you will be labelled a benefits cheat.
A you were successful
B they subsequently find out.