Under the Boundary Commission's fourth review, enacted in time for the 1997 election, the larger Shoreham portion of this constituency was taken from the disbanded
Shoreham seat and the minor East Worthing portion had been in the disbanded
Worthing seat. Before 1974, the Shoreham seat had been a part of the
Arundel and Shoreham seat. Between 1945 and 1950, the whole area was in the
Worthing seat and between
1918 and 1945 (on which the Boundary Commission was formed and carried out its first periodic review), in the
Horsham and Worthing seat. ;Political history The seat's first MP in 1997 was Tim Loughton who served until he stepped down for the
2024 general election. Although from 2001 to 2015 this was an unquestionably safe seat for the Conservative Party, its safety significantly declined after that, especially in 2017 when Labour reduced the Conservative percentage majority to single figures. It succeeded Crawley as Labour's principal target seat in the county of West Sussex, though still requiring a substantial swing, which it achieved in 2024 after the Conservative vote halved and
Tom Rutland was elected. ;Notable candidates The competitive hustings in September 2007 of the local
Labour Party selected
Emily Benn, granddaughter of
Tony Benn and niece of
Hilary Benn, former Secretaries of State, then aged 17, to contest the 2010 general election, making her the youngest ever Labour parliamentary candidate: had she been elected, she would have been the youngest MP since the
Reform Act 1832. Her father Stephen Benn is Viscount Stansgate, succeeding his father. Labour selected Latest TV newsreader
Sophie Cook to be its candidate in the
2017 general election. Had she been elected, she would have been the United Kingdom's first
transgender MP. Although she failed to win the seat, she achieved the best ever result of any non-Conservative Party candidate in any Worthing-based constituency, receiving 20,882 votes to the Conservatives' 25,988. ==Members of Parliament==