Stephen Morgan is the first Labour MP for Portsmouth South in the constituency's 106 year history. Born in Portsmouth in January 1981 and raised in Fratton, the son of a silk screen printer and the first in his family to go to university, he took degrees at Bristol and Goldsmiths. He has said that watching his grandfather go without the social care he needed at the end of his life is what drew him into politics.

His pre Parliament career was in public service management, not merely "roles at councils and a charity". He began at Portsmouth City Council, became Head of Community Engagement at the Royal Borough of Kensington and Chelsea from 2008 to 2015, overseeing a £3 million community investment programme, and then Chief Executive of Basingstoke Voluntary Action, as well as chairing the Portsmouth Cultural Consortium. Elected to Portsmouth City Council for Charles Dickens ward in 2016, he became Labour group leader within five months, and when the 2017 snap election came he told his charity board "Labour won't win, because we've never won that seat before" and took two weeks' leave to campaign. He won.

Portsmouth South had existed since 1918 and never returned a Labour MP; he took it from the Conservatives' Flick Drummond in 2017 by 1,554 votes, widened that to 5,363 in 2019, and to a majority of 13,155 (33.8 percent) in 2024, turning a seat Labour had never won into one of their safest on the south coast. He was the first ever Parliamentary Under-Secretary for Early Education, a newly created post he held from July 2024 to September 2025 covering early years, SEND, childcare, breakfast clubs and free school meals, before being succeeded by Olivia Bailey and appointed a Lord Commissioner of the Treasury, a government whip. He runs a walk-in high street constituency office on Albert Road in Southsea.

Morgan's strengths include being born and raised in Portsmouth, a working class family, being first in his family at university, a Bristol and Goldsmiths education, the £3 million community investment at RBKC, a charity chief executive background, being the first Labour MP for Portsmouth South in 106 years, trebling his majority from 1,554 to 13,155, pioneering the Early Education ministerial post, and an accessible high street office. His weaknesses include the move from a named ministerial brief to the anonymous whip office, no legislative achievement bearing his name from the Early Education post, and the structural reality that the whip role is invisible to Portsmouth voters. At 45, with the charity chief executive background, the Early Education brief and a 33.8 percent majority, he has converted Portsmouth South from a seat Labour had never won into a stronghold. Whether the whip role is a route back to a named ministerial brief or a permanent move to party management will determine the next stage of his career.