I'm not sure the previous response is correct. If you continue to live in your house, even though you have gifted it to your children I'm pretty sure you will still be regarded as having a beneficial interest in it as far as any form of tax relief is concerned, unless you are paying a market rent to your children.
This is too important an issue to get wrong and with potentially large sums of money involved you need to seek the advice of a solicitor to ensure that any actions you take and any trusts which are drawn up are watertight, and the implications clearly understood by all family members.