 Chief Constable Wallis commanded the largest geographical police area in England, extending 180 miles from the Dorset and Somerset borders in the east to the Isles of Scilly in the west.Wallis joined the Metropolitan Police as a constable in 1976 after graduating from Bristol University with a degree in Social Administration and Sociology.Prior to her service with Devon and Cornwall Constabulary, Wallis served with the Metropolitan Police Service for 18 years undertaking various roles including working at the Community Relations Policy Unit at New Scotland Yard as a Chief Inspector, with responsibility for developing policies on Domestic Violence and Racial Attacks, as well as working as a Detective Superintendent in South East London.