Hi, thank you for your question. If she has now lost mental capacity you will need to apply to the Court of Protection to become her deputy. This gives you similar powers to that of an attorney. The process of becoming a deputy is a lot more time-consuming and expensive than an Lasting Power of Attorney. A deputy must also do some things on an ongoing basis, such as paying an annual fee and submitting an annual report, so it is usually easier for someone to be an attorney rather than a deputy. You can read more about this and how to apply here:https://www.gov.uk/become-deputy/overview
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