The seat was created under the
Redistribution of Seats Act 1885. ;Political history Only
Conservative MPs had been elected in West Dorset until the 2024 general election, when Edward Morello won the seat for the Liberal Democrats for the first time since its creation. Historically there had mostly been large majorities; thus the seat was considered a
safe seat. The previous closest result in recent years was in 2001, when the then member,
Oliver Letwin, held his seat with a majority of only 2.8% over the
Liberal Democrat candidate, Simon Green. The second place in every election after 1970 has been taken by the
Liberal Party and, subsequent to that party's merging with the
SDP, the Liberal Democrats.
Labour's best results in the constituency were in 1945 and 1966. ;Prominent frontbenchers Oliver Letwin, with a settled background in policy formulation, was appointed Minister of State for Policy (a
Cabinet Office role) in the
Conservative-Liberal Democrat Coalition on 12 May 2010. He had previously served as
Shadow Chancellor of the Exchequer between 2003 and 2005. ==Boundaries==