If something happens to you and you are no longer able to make decisions for yourself or manage your own affairs, you will need someone that you trust to make those decisions for you.
Everyday decisions and responsibilities such as accessing your bank account, paying bills, and managing your property will transfer to your Attorney if you have an EPA for Property in place, and all decisions relating to your personal care and welfare will transfer to your Attorney if you have an EPA for Personal Care and Welfare in place.
It is important to note that you can only set up EPAs while you have mental capacity. The moment you lose mental capacity, your family would be required to apply to the Family Court for Orders to act on your behalf (see here for more information on this topic).
If you would like to set up an EPA you will need to speak to a lawyer, who will advise you on the next steps you need to take.