Seem to recall reading this in the news.
Most places cite The Guardian as the source (including the Guardian itself) but I can’t find the original article. The story is from 1995, so potentially predates their website?
https://www.theguardian.com/money/1999/nov/05/workandcareers1
?After being charged £20 for a £10 overdraft, 30 year old Michael Howard of Leeds changed his name by deed poll to ‘Yorkshire Bank Plc are Fascist Bastards’. The bank has now asked him to close his account, and Mr Bastards has asked them to repay the 69p balance by cheque, made out in his new name.
Apparently he worked in Marketing, and it’s suggested that it’s not the first time he’s done it.