Missedout
I notice this topic comes up from time to time. The consensus is usually 'do it yourself - it's easy'.
It may be straightforward in the majority of cases but I have a close friend whose older half sister is trying to challenge the power of attorney arrangement for their father who now has Altzheimers. Power of attorney was overseen by a solicitor who attested that the father was capable of making decisions regarding POA at the time. The half sister is making the family's life a misery, sending social services and police to my friend's mother and keeps up a steady stream of vile comments to the rest of the family. The half sister is also trying to get access to her father's bank accounts but he doesn't always remember how poisonous she became to his second wife and family and that he had no intention of allowing his oldest daughter to have any say in decisions about his care should he no longer have capacity. The solicitor in this case has been able to support the family and they are getting to the stage of taking out an injunction. It has all turned very nasty and the whole family have been affected.
'Do it yourself' POA may not always be the best way, even though it is cheaper.
We did POA on Gov. Website and it was straightforward and cost less than £300 for both parts compared to £1200 the solicitor quoted me.
After all you have to provide all the info to the solicitor in the first place so you may as well put it on the forms just like they will! Remember this IS 100% legal document not some dodgy thing. The documents you receive are exactly the same as if you used a solicitor.
Interestingly, we had a similar scenario to your friend when I was granted POA but since I was confident that I had done nothing wrong I left it for the Office of the Public Guardian to sort out and they did and they said there was no evidence of wrongdoing on my part. This cost me nothing and I did not involve a solicitor. The only person making money out of this is your friend’s solicitor but there really is no need to even involve one.