Greater London from 1965, but Sunbury on Thames Urban District joined two others in a transfer to a neighbouring administrative county, in this case Surrey. In 1974, under the Local Government Act 1972, the urban district was abolished and its former area was combined with that of Staines Urban District to form the present-day borough of Spelthorne. Notes References See also Local Government Act 1894 London Government Act 1963 Local Government Act 1972 Middlesex County Council Surrey County Council Sanitary Districts Districts of England abolished by the Local Government Act 1972 Districts of England created by the Local Government Act 1894 Sunbury-on-Thames History of Surrey History of local government in Middlesex Urban districts of England