The constituency was a Labour - Conservative marginal for much of its history, changing hands several times between the two parties during its 98-year existence. The seat was initially a safe Conservative seat under the influence of the Stanleys, the Earls of Derby. Indeed the seat was held for twenty years by Arthur Stanley, a younger son of the 16th Earl. The only serious challenge by the Liberal Party in this period was in 1910 when William Lever, the leading industrialist, contested the seat. Indeed this was the last time the Liberal Party would contest the constituency until the 1970s. James Bell became the first non Conservative to be elected for this seat since its creation in 1885, principally due to a divided conservative vote between the Coalition Conservatives and the candidate of the National Farmers Union at the 1918 general election. Francis Blundell regained the seat for the Conservatives in 1922 but was to lose it to Labour's Sam Tom Rosbotham in 1929. Sam Tom followed Ramsay MacDonald when the Labour Party split in 1931, and then defended the seat successfully for National Labour in both 1931 and 1935. He was succeeded in 1939 by Commander Stephen King-Hall for National Labour. In a repeat of 1918, the election of 1945 saw future Prime Minister, Harold Wilson elected when the Conservative Party opted to stand against the National candidate, Stephen King-Hall, and split the anti Labour vote. With Harold Wilson moving in 1950 to the newly created Huyton constituency, the seat saw a succession of Conservative Members who were then moved on to the House of Lords, until the election of the much respected Colonel Douglas Glover in the 1953 by-election. The retirement of Douglas Glover in 1970 saw the election of Harold Soref for the Conservatives who, however, was only to hold the seat for four years. Boundary changes brought in KirkbyNew Town, leading to the election of Robert Kilroy-Silk for Labour. The constituency ceased to exist with the implementation of the 1983 boundary changes. The sitting MP moved to the new Knowsley North seat.
This reflected local government boundary changes in 1931/32: Lathom & Burscough UD had been absorbed by Ormskirk UD and Sefton RD by West Lancashire RD.
1955–74
Following further council boundary changes in 1954, the remaining parishes from West Lancashire RD,, were included in the constituency from 1955.
1974–83
From 1970 the seat was again redefined, to cover the urban districts of Formby, Kirkby, Ormskirk and Rainford, and West Lancashire Rural District.
Abolition
The constituency was abolished by the Parliamentary Constituencies Order 1983, which redrew constituencies based on the new counties and districts created in 1974. The Ormskirk area became part of West Lancashire, Kirkby was included in Knowsley North, Rainford in St Helens North and Formby, Aintree and Melling in Crosby.
Members of Parliament
Election results
Elections in the 1880s
Elections in the 1890s
Forwood's death caused a by-election.
Elections in the 1900s
Elections in the 1910s
Elections in the 1920s
Elections in the 1930s
;1939 Ormskirk by-election In the Ormskirk By-Election of 27 October 1939, Stephen King-Hall, National Labour was elected unopposed.
