Yesterday, on the very floor of what has clearly become the all-too-common House of Commons, no less a person than The Right Honourable The Honourable Hilary Benn MP used four times a word, meaning "lavatory" and beginning with t, which I find that I am unable to write down. Nancy Mitford, thou shouldst be living at this hour!
Actually, I do in fact have a theory that Nancy Mitford is still alive. For the last dozen years, she has been choosing the candidates to be imposed on safe Labour seats when their sitting MPs retire to the Lords too late for their Constituency Labour Parties to choose their successors. She is still doing this, but is now also responsible for compiling David Cameron's U-list, as it ought properly to be called.
As much as anything else, this would account for how it is possible (which it is...) to fall into both categories.