Henry Mainwaring in the King's cause in the English Civil War, was exiled to France, and died in poverty. He was buried at St. Giles' Church, Camberwell, London, on 15 May 1653. Mainwaring married a daughter of Sir Thomas Gardiner in 1630. She died in 1633. His brothers were Sir Arthur Mainwaring, Carver to Prince Henry, George Mainwaring, the defender of Tong Castle, and Sir Thomas Mainwaring, the Recorder of Reading. The Mainwaring family was old and distinguished, probably having arrived in England in the train of William the Conqueror (1066). Henry Mainwaring Sir Henry Mainwaring (1587–1653), was an English lawyer, soldier,
Captain Mainwaring kind of orchestrated social conspiracy against him, it transpires that Mainwaring's inverted snobbery goes as far as doing all he can to hold Wilson back from promotion by writing negative reports on him to Head Office – as we discover in "A. Wilson (Manager)". He often rants about how society will be different "after the war", and is often disdainful of the upper classes and their pretensions. In "Wake Up Walmington", Mainwaring raves about how after the war, the country will be run by professionals, by people who've worked like him, but does not approve of Hodges being Chief ARP