Ruth Margaret Cadbury (born 14 May 1959) is a British politician and planner who has served as Member of Parliament (MP) for Brentford and Isleworth since 2015.

[7][8][9] In her maiden speech to the House of Commons on 2 June 2015, she referenced her Quaker background and its relevance to social justice.

[11] She supported Owen Smith in the failed attempt to replace Jeremy Corbyn in the 2016 Labour Party leadership election.

[13][14] Cadbury was dismissed as Shadow Housing Minister on 29 June 2017 for contravening a whipped vote on an amendment to the Queen's speech calling for the UK to remain in the European Single Market; whilst the Labour position was to abstain, she voted to support the motion.

[20] In Keir Starmer's front bench reshuffle of November 2021, Cadbury was appointed Shadow Trade Minister.

[22] Cadbury is a co-sponsor of Kim Leadbeater's Terminally Ill Adults (End of Life) Bill on assisted suicide.