Ruth Cadbury has been Labour MP for Brentford and Isleworth since 2015. Born in Birmingham in May 1959, she is a member of the Cadbury family, the chocolate dynasty that built Bournville and shaped British industrial philanthropy, and a Quaker. For a politician whose career has been defined by planning, housing, transport and ethical public service, that Cadbury Quaker heritage is not decorative background; it is the foundation of her political identity.

A University of Salford graduate who worked as a town planner, she served 29 years as a Hounslow councillor across three wards from 1986 to 2015, and was Deputy Leader of the council from 2010 to 2012. She entered Parliament in 2015 by just 465 votes, defeating Conservative Mary Macleod, and was reelected in 2024 with a majority of 9,824 (21.7 percent), a vote share of 44.2 percent that reflects retention rather than expansion even in a landslide year.

She supported Owen Smith against Corbyn in 2016 and served as Shadow Housing Minister (2016-2017) before Corbyn sacked her in 2017 for backing an amendment to keep the UK in the single market; she later held shadow roles in international trade and justice. A member of the Transport Committee since 2018, she was elected its Chair on 11 September 2024, defeating three other candidates, and sits on the Liaison Committee as chairs do. She chairs the All Party Parliamentary Groups on Cycling and Walking and on Women in Transport, and has previously served on the Women and Equalities and Justice Committees.

As Transport Committee chair she has led work on transport accessibility, producing an "Access Denied" report and following up a year later with a debate on enforcement and disabled passengers' rights, and has scrutinised planning and infrastructure, EV charging networks, rail, surface access to Heathrow, and modal shift.

Cadbury's strengths include the Cadbury family heritage and Quaker tradition providing a distinctive ethical identity, 29 years as a Hounslow councillor, a town planning background, the 2015 win by 465 votes showing she can win in hostile territory, six years on the Transport Committee before becoming chair, the chair itself giving her institutional weight, the Cycling/Walking and Women in Transport APPG chairs, and the single market sacking showing independence. Her weaknesses include no ministerial office despite Labour's return to power, no legislative achievement bearing her name, a dropping vote share in 2024, and the structural challenge that select committee scrutiny is valuable but invisible to most voters. At 66, the Transport Committee chair is likely the peak institutional role of her career. Whether the accessibility report, the Heathrow work, and the modal shift scrutiny produce policy changes will determine whether 29 years of council service and a decade in Parliament culminate in something voters can see and use.