In England and Wales, if you’ve set up a lasting power of attorney before 1 October 2007, it will be called an enduring power of attorney. You can’t set up this type anymore. But if you have one, and it was filled in correctly, you can register and use it – as long as you still have mental capacity.
But bear in mind that it will only cover decisions about property and financial affairs. If you want to appoint someone to make decisions about your health and welfare, you’ll need to set up a health and welfare lasting power of attorney.
When it’s set up, you’ll need to cancel your existing enduring power of attorney, so there’s no confusion, and let your attorneys know.