If you don't take all the money that's available to you when you first take out your lifetime mortgage, then you can choose to use what's left as a drawdown fund. 

This means that after taking an initial amount, you're able to take out additional money if you need it in the future. It's a great deal, because you only have to pay interest on the money that you've actually taken.

Your drawdown facility is linked to the Guaranteed Inheritance Feature, allowing you to choose whether you want to save all the money for your beneficiaries or make use of it in your lifetime.