sentences:  Early in the Second World War he became private secretary to Frederick Lindemann, 1st Viscount Cherwell, then worked for Winston Churchill.While he was First Lord of the Admiralty, Churchill created a Statistical Section in the Admiralty which was joined by Bensusan-Butt, Roy Harrod, Bryan Hopkin, Douglas MacDougall and Tom Wilson.At Lord Cherwell's recommendation, Butt did an analysis of the effectiveness of Bomber Command.