Do not watch this if you are Politically Correct as you will be sorely offended.
William "Bill" Callaghan is a Yeoman Warder at HM Tower of London and became famous after this video was taken.
His sarcastic and dry style is very unpolitically correct and jovially mocks everyone from the Royal Marines, French, Elderly and Hollywood actor Mel Gibson.
You won't like: "History is nearly always written by the people who win. This explains all the empty pages in the French history books." if you are French, and Italians may be up in arms over one particular sentence!
But I thoroughly enjoyed it and don't mind hanging my colours to the mast!