Let's see if the format of this one is better.
IHT will only be an issue if the estate is worth more than �312,000.
See a solicitor regarding what your options are, but if she sells the home/transfers it to you it is very likely that she will be liable for care home fees. Local authorities are very well aware that people try to avoid fees in this way, and regard it as deliberate disposal of assets.
Anyway, if she has assets she can use, it means you can have a choice of care home for her rather than risk her being put in the one the local authority thinks is the cheapest.
This site may help:
http://www.direct.gov.uk/en/HealthAndWellBeing
Click the Care Homes link