Born at Forest Gate on 2 September 1866, the youngest son of Benjamin Warner, silk manufacturer, and his wife, *née* Branscombe. He was educated at Worthing and at King's College, London, where he took honours in the MB examination 1894, and subsequently became an Associate of King's College. He served as house physician and house surgeon at King's College Hospital, and then settled in practice at 98 Upper Cliff Road, Gorleston-on-Sea, near Yarmouth in Norfolk, and became medical officer to the Gorleston Cottage Hospital. During the first world war he was commissioned captain, RAMC on 21 April 1916. Warner married on 19 September 1914 Martha H (Annie) Cummings, who survived him with a son and daughter. He died at Rudyard, Cheshire Street, Market Drayton, Salop on 28 March 1942.