[ben_w]

UK is very flexible with names; see for example how former Prime Minister Boris Johnson's full name is "Alexander Boris de Pfeffel Johnson", but his parliamentary profile just says "Boris Johnson" https://members.parliament.uk/member/1423/career

Also, in 2002, Richard James changed his name to “Mr Yellow-Rat Foxysquirrel Fairydiddle”, in exchange for a pint of beer*.

You're not allowed to use a deed poll to give yourself a title, so the "Count" part of "Count Binface" may need to be changed, but specifically because he presents himself as an intergalactic space lord, the official example (for passports) is with "Doctor" being used as a first name being fine when it's not a fake title: https://www.gov.uk/government/publications/the-names-we-use-...

* It says something about the world we live in that my effort to find the story about Mr Fairydiddle returned one of my own comments on hacker news rather than a newspaper: https://news.ycombinator.com/item?id=26375394