Portsmouth South

Portsmouth South is a constituency in Hampshire in South East England. It covers the southern half of Portsea Island, including Portsmouth city centre and the neighbourhoods of Somerstown, Southsea, Eastney, Milton, Fratton and Buckland.

Portsmouth is a port city with a maritime history. Its importance as a naval base and centre for shipbuilding made it the most heavily fortified city in the world in the early 19th century.^[1] HMNB Portsmouth in the west of the constituency is the home base of most of the Royal Navy's surface fleet. Much of the city centre was destroyed by the Luftwaffe during World War II and underwent post-war redevelopment with a high quantity of council housing. Today, this area is highly-deprived. Southsea is a popular seaside resort; this area and its surroundings are wealthier than the city centre and mostly consist of dense Victorian and Edwardian terraces.^[2] House prices across the constituency are generally lower than the national average and considerably lower than the rest of South East England.^[3]

Portsmouth South has a low proportion of older adults and a large student population;^[4] the constituency contains the University of Portsmouth which has around 24,000 students.^[5] Residents have low levels of income and homeownership and the child poverty rate is above-average.^[3][6] They are generally well-educated and a high proportion work in the education, tourism and defence sectors.^[3][7] The percentage of residents claiming unemployment benefits is above-average.^[6] White people made up 81% of the population at the 2021 census. Asians were 9% of residents, with people of Bangladeshi origin being the largest Asian group.^[8]

At the local city council, most of the constituency is represented by Liberal Democrats with some Labour Party and Reform UK councillors elected in the city centre. An estimated 51% of voters in Portsmouth South supported leaving the European Union in the 2016 referendum, similar to the UK-wide rate of 52%.^[3]

1918–1950: The County Borough of Portsmouth wards of Havelock, Highland, St Paul, St Simon, and St Thomas.

1950–1955: The County Borough of Portsmouth wards of Havelock, Highland, Kingston, St Paul, St Simon, and St Thomas.

1955–1974: The County Borough of Portsmouth wards of Havelock, Highland, Kingston, St Jude, St Simon, and St Thomas.

1974–1983: The County Borough of Portsmouth wards of Buckland, Fratton, Havelock, Highland, Kingston, St Jude, St Simon, and St Thomas.

1983–2010: The City of Portsmouth wards of Charles Dickens, Fratton, Havelock, Highland, Milton, St Jude, and St Thomas.

2010–present: The City of Portsmouth wards of Central Southsea, Charles Dickens, Eastney and Craneswater, Fratton, Milton, St Jude, and St Thomas.

The 2023 review of Westminster constituencies left the boundaries unchanged.^[9]

The constituency was created in 1918 when the larger Portsmouth constituency was split into three divisions: Central, North and South. The Portsmouth Central constituency was abolished in 1950.

During the 2010 general election campaign, independent candidate Les Cummings distributed a leaflet claiming that sitting MP Mike Hancock was a paedophile, which was later proven in court to be false. Cummings was subsequently convicted under the Representation of the People Act 1983 for distributing material which was known to be false with the intention of smearing or defaming to affect the return of a member of parliament, and was fined £500 as a result.

Stephen Morgan won the seat at the 2017 general election, the first time ever that the Labour Party held the seat. Morgan's win was one of 30 net gains made by Labour at that election. At the 2019 general election Labour increased its vote share by 7.6%. This was the second-highest increase in Labour vote share in any seat in the United Kingdom (after Bradford West) in an election where Labour's vote share fell in all but 13 constituencies.^[10]

Morgan's vote share remained steady in the 2024 election, with the Conservatives falling significantly behind both Labour and Reform. Portsmouth South can be considered a safe Labour seat. From a high of 45.9% in 2010, the Lib Dems are now in fourth position in a seat they held between 1997 and 2015, despite holding the majority of councillors in this constituency.

Portsmouth prior to 1918

• List of parliamentary constituencies in Hampshire
• List of parliamentary constituencies in the South East England (region)