You might not need this help right now, but you can set up a Power of Attorney for the future. There are different types of Power of Attorney, and you might need more than one:
Ordinary or General Power of Attorney: To cover a temporary amount of time, like a hospital stay or holiday. This can only be used when you can make your own decisions.
Lasting or Continuing Power of Attorney: To give someone you trust the legal authority to make financial decisions for you. For example, if you lose the mental capacity to make your own decisions, either now or in the future.
Court of Protection: When you lose your mental capacity and have no Power of Attorney in place. The Court of Protection can choose someone to make decisions on your behalf. The UK government has provided some useful guidance on this process.