St Helens South and Whiston (UK Parliament constituency)

St. Helens South and Whiston is a constituency created in 2010 represented in the House of Commons of the UK Parliament by Marie Rimmer of the Labour Party.

Further to the completion of the 2023 Periodic Review of Westminster constituencies, the seat was subject to minor boundary changes, with parts of Whiston and Cronton being included in the new constituency of Widnes and Halewood, first contested at the 2024 United Kingdom general election.

History
Following the Fifth Periodic Review of Westminster constituencies the Boundary Commission for England expanded and renamed the St Helens South seat, covering the south of the Metropolitan Borough of St Helens and three wards of the Knowsley borough which were in a neighbouring seat.
 * Creation

The area has been held by the Labour Party since the 1945 election (including predecessor seats), and part since 1935. The 2015 result made the seat the 24th safest of Labour's 232 seats by percentage of majority.
 * Results of the winning party

The 2015 general election saw (with 11.3%) more than the national average swing (+9.5%) to UKIP (narrowly placed third). Labour's candidate won more than fivefold those votes, scoring 59.8%.
 * Results of other parties

Turnout has risen from 59.1% to 62.3%
 * Turnout

Boundaries
The boundaries have not changed to date.

Its electoral wards are:


 * From Knowsley: Prescot East, Whiston North and Whiston South
 * From St Helens: Bold, Eccleston, Rainhill, Sutton, Thatto Heath, Town Centre and West Park.

2024-present

Further to the 2023 Periodic Review of Westminster constituencies, enacted by the Parliamentary Constituencies Order 2023, from the 2024 United Kingdom general election, the constituency is composed of the following wards (as they existed on 1 December 2020):


 * The Metropolitan Borough of Knowsley wards of: Prescot South; Whiston & Cronton (polling district WC5).


 * The Borough of St Helens wards of: Bold; Eccleston; Rainhill; Sutton; Thatto Heath; Town Centre; West Park.

Following boundary changes in the Borough of Knowsley, the majority of the Whiston & Cronton ward - excluding the town centre of Whiston - will be included in the new constituency of Widnes and Halewood.

Following a local government boundary review in St Helens which came into effect in May 2022, the constituency will now comprise the following from the 2024 general election:


 * The Metropolitan Borough of Knowsley wards of: Prescot South; Whiston & Cronton (polling district WC5).


 * The Borough of St Helens wards of: Bold & Lea Green; Eccleston; Rainhill; St Helens Town Centre; Peasley Cross & Fingerpost; Sutton North West; Sutton South East (nearly all); Thatto Heath; West Park.

Elections in the 2010s

 * * Served as an MP in the 2005–2010 Parliament