While you have the mental capacity to understand the actions you are taking, you can appoint one person, or more, as your Lasting Power of Attorney. (LPA)
There are two types of LPA, which require separate application forms.
The first is for financial and property matters and allows your Attorney to manage your bank accounts and other financial affairs, including selling your home if you need to move into long-term residential care. The other order is for health and welfare decisions and allows your Attorney to be actively involved in where and how you are cared for.
The authority granted by a Lasting Power of Attorney ceases immediately on death. An Attorney should not carry out any transactions after the death. The office of the Public Guardian should be informed  of the death, by the Attorney  and the LPA documents returned to them.