The ceremonial county of Cheshire, which comprises the unitary authorities of Cheshire East, Cheshire West and Chester, Halton and Warrington, has returned 11 MPs to the UK Parliament since 1997. Under the Local Government Act 1972, which came into effect on 1 April 1974, the boundaries of the historic/administrative county of Cheshire were significantly altered. Over half the electorate was transferred to the new metropolitan counties of Greater Manchester and Merseyside, partly compensated by the addition of Warrington, Widnes and surrounding areas to the north which were transferred in from Lancashire. These changes were reflected in the following redistribution of parliamentary seats which did not come into effect until the 1983 general election, resulting in a net reduction in the cou