So I think it works a little differently. Say your house is worth £500,000. The equity company would lend you say a maximum of £200,000. You don’t have to pay it back and they can’t force you out of the property before you die or move into a care home. Then the house is sold after this and they get their % back (which will be much more than the original £200,000 you borrowed!). Anything left goes to your beneficiary’s.
I believe it’s a terrible deal. But many see it as a way to enjoy their retirement.