Gail Bradbook is a British environmental activist and molecular biophysicist who co-founded the environmental social movement Extinction Rebellion. She has been involved in various campaigning groups in Stroud, including a 2010 to 2013 period as voluntary director of Transition Stroud, an anti-fracking protest, various actions in opposition to the building of a local incinerator, including a naked protest, and an early Extinction Rebellion roadblock in Merrywalks, Stroud. In 2015, with George Barda, she set up the group Compassionate Revolution, (which morphed into Rising Up!, out of which came Extinction Rebellion).