You could be in the money. Well, a little bit of money.
The fee for registration of a power of attorney was reduced on 1 April 2017 by £28 to £82
(see http://www.breakinglaw.co.uk/search/label/powers%20of%20attorney). The fee should have been reduced earlier as the cost of dealing with the registration process diminished and this was not reflected in the fee which was being charged before the reduction. The result is that if you paid a fee between 1 April 2013 and 31 March 2017 which is the period over which an excessive fee was being charged, you will qualify for a refund.
You can apply online - visit https://www.gov.uk/power-of-attorney-refund and enjoy yourself. Or,if you fancy a natter before Loose Women comes on, call 0300 456 0300 and select option 6 but I fancy there will be a call charge.