Does your mum have mental capacity? If so you have more options now. Sounds like, as another poster states, your parents did enduring POA before law was changed, as there was only one type back then.
if mum does have mental capacity, I’d encourage you to see solicitor asap. Ask about revoking Enduring POA and switching to LPOA with both set up for mum. She also has way more flexibility giving you powers to certain things as and when, like doing her banking for her if all the computer stuff gets way too much. You can then invoke the full LPOA only if and when needed.
obvoisuly if mum doesn’t now have mental capacity, there’s no real point trying to switch even if you could, sadly. The only alternative then is to apply for a “deputyship” to office of guardianship. You really only should do that as last resort. It is expensive and hard to set up, it then requires an annual fee and over site by OOG every year it is needed for. Really don’t want to do that, and given there is a EPOA is probably unnecessary.
our DD died of Lewy body dementia. He was “only” really ill for 2 years, and my eldest sibling didn’t need to invoke the full LPOA as he had been managing dads finance and house for years anyway under the restricted rights DD had already given him, (he had his own cards and login to dads banks) and it didn’t change. Would have been needed if his house would have had to be sold etc. we didn’t need the health LPOA either as he was sectioned and given a “end of life pathway” very shortly into his obvious illness, and “nearest relative” piece came into play around his nursing and medical needs anyway . But it as always a relief knowing we could invoke both, fully, if and when needed.