Southend West is a constituency in the House of Commons of the UK Parliament. The seat is currently held by Anna Firth who won the 2022 by-election, following the murder of the incumbent MP, David Amess. History The constituency was created for the 1950 general election under the Representation of the People Act 1948, when the Parliamentary Borough of Southend-on-Sea was split in two. Since creation, the seat has been held every election by the Conservative Party, with majorities ranging from 5.7% during the Labour Landslide of 1997 to 43.4% in 1955. It has historically been seen by pundits as a safe Conservative seat. Because four members of the Guinness family have held the seat (or its predecessor, Southend) it has been dubbed in political analyses in the media as "Guinness-on-Sea". The seat was represented by David Amess for 24 years, from 1997 to 15 October 2021, when he was stabbed and killed. Amess was previously the MP for Basildon from 1983. A by-election was held to elect a replacement MP. In a similar vein to the subsequent by-election following the murder of Labour MP Jo Cox in 2016, all major contender parties stated they would not field candidates in opposition to the Conservative nominee. Boundaries and boundary changes 1950–1955: The County Borough of Southend-on-Sea wards of Chalkwell, Eastwood, Leigh, Milton, Prittlewell, St Clements, Victoria, and Westborough. Formed primarily from western parts of the abolished Parliamentary Borough of Southend-on-Sea. 1955–1983: The County Borough of Southend-on-Sea wards of Blenheim, Chalkwell, Eastwood, Leigh, Prittlewell, St Clement's, Southbourne, and Westborough. Realignment of boundary with Southend East. 1983–2010: The Borough of Southend-on-Sea wards of Belfairs, Blenheim, Chalkwell, Eastwood, Leigh, Prittlewell, and Westborough. Marginal changes following the redistribution of wards in the Borough of Southend-on-Sea. 2010–present: The Borough of Southend-on-Sea wards of Belfairs, Blenheim Park, Chalkwell, Eastwood Park, Leigh, Prittlewell, St Laurence, Westborough, and West Leigh. Further marginal changes were due to a redistribution of local authority wards. The constituency comprises a small part of the West of Southend-on-Sea, and includes Leigh-on-Sea and Westcliff-on-Sea. It is bounded to the North and East by Rochford and Southend East, to the North by Rayleigh and Wickford, to the West by Castle Point, and to the South by the very end of the Thames estuary. Constituency profile Registered jobseekers were in November 2012 close to the national average of 3.8%, at 3.5% of the population based on a