Southampton Test is a constituency[n 1] represented in the House of Commons of the UK Parliament by Satvir Kaur, a member of the Labour Party since 2024.

Horace King, the MP between 1950 and 1955, before switching to the neighbouring seat of Southampton Itchen, would later become the first Speaker of the House of Commons from the Labour Party.

Whitehead did not stand at the 2024 general election;[3] he was succeeded by fellow Labour Party member, Satvir Kaur, with a majority of over 9,000.

It is traditionally the marginally more affluent of the two constituencies in the city, before 2010 having a higher number of Tory representatives than its neighbour Southampton Itchen – named after the other major river.

[4] 1955–1983: The County Borough of Southampton wards of Banister, Bargate, Bassett, Coxford, Freemantle, Millbrook, Portswood, Redbridge, and Shirley.