Phoebe Plummer

Phoebe Plummer (born 2001) is a British climate activist. Initially inspired by a United Nations report from the Intergovernmental Panel on Climate Change, they joined Just Stop Oil in August 2022 and were arrested three times in their first week. An October 2022 protest, in which Plummer and Anna Holland threw tomato soup at a Vincent Van Gogh Sunflowers painting at London's National Gallery, caused worldwide outrage and £10,000 damage to the frame but emboldened activists to carry out similar actions. Plummer was sentenced the following month for blocking the M25 motorway. In November, Plummer and other activists caused tailbacks on multiple roads in West London with a slow march protest, for which they faced the first jury trial under section 7 of the Public Order Act 2023.

Plummer was arrested after delivering a letter to Emily Thornberry MP in March 2024, though subsequently delivered a letter to Wes Streeting MP to the wrong address. They were convicted of "interference with key national infrastructure" and criminal damage in May and July 2024. Shortly after the second conviction, Plummer was arrested for defacing departure boards at Heathrow Airport. They were sentenced to 3 and 24 months in prison for both their convictions two months later, and unsuccessfully appealed the latter in January 2025.