Cheshire Constabulary is the territorial police force responsible for policing the English unitary authorities of Cheshire East, Cheshire West and Chester, Halton (including Runcorn, and Widnes) and Warrington. The force is responsible for policing an area of 946 square miles (2,450 km2) with a population of roughly 1 million. The Deputy Chief Constable is Janette McCormick. The two Assistant Chief Constables are Guy Hindle and Mark Roberts.