Henry Mainwaring Henry Mainwaring Sir Henry Mainwaring (1587–1653), was an English lawyer, soldier, author, seaman and politician who sat in the House of Commons from 1621 to 1622. He was for a time a pirate based in Newfoundland and then a naval officer with the Royal Navy. He supported the Royalist cause in the English Civil War. Mainwaring was born in Ightfield, Shropshire, second son of Sir George Mainwaring and his wife Ann, the daughter of Sir William More of Loseley Park in Surrey. His maternal grandfather was Sir William More, Vice-Admiral of Sussex. He graduated from Brasenose College at Oxford University,
Captain Mainwaring manager and his status as Captain and commander of the local Home Guard volunteer unit. He became commander of his home guard unit by saying that he had served as a captain in the last British conflict, despite serving 'somewhere in the Orkneys' during the Great War and only being deployed to France in 1919, the year after the armistice was signed. He was later officially designated as the Captain by the GHQ, in the episode Room at the Bottom, after his brief reduction in rank. Despite his claims that he was born into a well-to-do family, it is revealed