The Cheshire, Greater Manchester, Lancashire and Merseyside (County and District Boundaries) Order 1993
This Order makes changes in the boundary of the metropolitan county of Greater Manchester (metropolitan borough of Wigan) with–the county of Cheshire (borough of Warrington);the county of Lancashire (district of West Lancashire); andthe metropolitan county of Merseyside (metropolitan borough of St Helens). It also transfers areas within Greater Manchester between Wigan and–the metropolitan borough of Bolton; andthe city of Salford.