Gail Marie Bradbrook (born 30 April 1972) is a British molecular biophysicist and environmental activist best known as a co-founder of Extinction Rebellion (XR), the global movement that used mass non-violent civil disobedience to force climate and ecological breakdown into mainstream public and political consciousness from 2018 onward.
Born in Hemsworth, West Yorkshire, and raised in the nearby mining community of South Elmsall, Bradbrook grew up in a working-class family; her father worked at the South Kirkby colliery. An early interest in animal rights drew her into activism: as a teenager she joined hunt saboteurs and, at age 14, the Green Party. She has described facing bullying at school for her political views. Academically strong, she studied at the University of Manchester, where she graduated top of her year in molecular biophysics-related studies and completed a PhD in the field. She undertook postdoctoral research in India and France.
After her scientific training, Bradbrook shifted toward social and digital inclusion work. From 2003 to 2017 she served as director of strategy at Citizens Online, an organisation campaigning for better internet access for disabled people; she helped launch the “Fix the Web” campaign. She settled in Stroud, Gloucestershire, where she became involved in local green initiatives, including serving as voluntary director of Transition Stroud (2010–2013), anti-fracking protests, and campaigns against a local incinerator that included a naked protest. She participated in the Occupy movement and peak-oil campaigns but found earlier efforts limited in scale and impact.
In 2015, with George Barda, she co-founded Compassionate Revolution, an online platform encouraging pledges of “art, heart and civil disobedience.” This evolved into Rising Up!, the organisational precursor to Extinction Rebellion. A pivotal personal experience came in 2016 when Bradbrook attended a psychedelic retreat in Costa Rica, where she took ayahuasca, iboga and kambo. She has described the experience as transformative, clarifying her approach to campaigning and leaving her determined to try more radical methods after years of frustration with incremental activism. Upon returning, she connected with Roger Hallam and others; together they developed the strategy that became XR. The decision to launch a mass civil-disobedience campaign was formalised at a meeting of about 15 activists in Bradbrook’s home in Stroud. XR was publicly launched in 2018.
Extinction Rebellion’s core theory drew on research into non-violent movements (notably the idea that mobilising roughly 3.5 percent of a population can produce systemic change) and emphasised regenerative culture, grief for ecological loss, and disruption designed to raise the political cost of inaction. Its three main demands were that governments tell the truth about the climate and ecological emergency, achieve net-zero emissions by 2025 (a more ambitious target than most official pathways), and create citizens’ assemblies on climate and ecological justice that would sit alongside elected institutions. Bradbrook and co-founders, including her then-partner Simon Bramwell, stressed non-violence and a decentralised, “holacratic” structure rather than hierarchical leadership, though she became one of the movement’s most visible public faces.
XR’s April 2019 actions in London—occupations of key sites including Oxford Circus (with a pink boat), Waterloo Bridge and Parliament Square—brought parts of the capital to a standstill, generated thousands of arrests, extensive media coverage, and helped shift the Overton window on climate urgency in the UK. Parliament declared a climate emergency; net-zero legislation advanced; and a citizens’ assembly on climate was later convened. The movement rapidly internationalised, with groups reported in dozens of countries. Bradbrook’s own talks on the science of the crisis, the psychology of participation, and the necessity of civil disobedience circulated widely and helped recruit participants. She was named among GQ’s top 50 influencers and appeared on the BBC Radio 4 Woman’s Hour Power List in 2020.
Bradbrook has repeatedly engaged in personal acts of civil disobedience and faced legal consequences. In October 2019, during XR protests, she climbed onto a canopy at the Department for Transport and broke a reinforced security-glass pane (repair cost approximately £27,660) in protest against HS2 and related transport policies. She carried a dossier arguing for protection of “conscientious protectors” and referencing the late Polly Higgins’s work toward an international crime of ecocide. After delays and legal arguments, she was convicted of criminal damage in November 2023. In December 2023 she received a 15-month prison sentence suspended for 15 months, 150 hours of unpaid work, and a 12-month supervision order. She has been arrested multiple times and has publicly criticised courts for focusing on damage to property while, in her view, failing to hold to account those driving ecological destruction.
Critics have accused XR of elitism, economic disruption that harms ordinary people, alarmism, or insufficient attention to social justice and diversity in its early phases; some internal tensions and strategic debates (including over tactics and messaging) have also arisen. Bradbrook has rejected middle-class characterisations of herself, pointing to her mining-family background and life in a former council house in Stroud. She has argued that the underlying economic and political system, rather than any single party, is the core problem, and she has continued to advocate citizens’ assemblies as a way to bypass narrow private interests. In recent years she has spoken about community resilience in the face of accelerating climate impacts and rising authoritarianism, promoting a “Lifehouse” model of local mutual support and democratic power currently being trialled in Stroud. She has also been associated with initiatives such as XR Being the Change and has written and spoken about the need to defend protest rights as climate impacts intensify.
Bradbrook is the mother of two sons and has been married and divorced (one former spouse is the physicist Jeff Forshaw). She continues to live in Stroud. Her trajectory—from Yorkshire mining community and laboratory science, through digital-inclusion work and local green campaigns, to co-founding a movement that briefly made climate emergency a central political theme in multiple countries—illustrates both the possibilities and the limits of high-profile civil disobedience in the face of systemic inertia. Whether XR’s long-term legacy is measured by policy shifts, cultural awareness, or the subsequent evolution of climate activism, Bradbrook remains one of its foundational and most articulate voices.
