Siân Berry

Jonathan and Siân were elected co-leaders on a joint ticket in 2018. This is Jonathan’s second term, as he had served as Green Party co-leader for two years previously with Caroline Lucas.Siân and Jonathan stood on a joint platform to become England and Wales’s third party, to redirect economic policy away from an obsession with growth and towards well-being, and to work tirelessly to get climate change to the top of the political agenda.

Jonathan joined the Green Party in 2010, shortly after encountering then Conservative Party leader David Cameron. He was waiting to attend a hospital appointment at the Evelina Children's Hospital with his son Samuel and challenged the future Prime Minister about the Conservative Party’s manifesto pledges, arguing they’d increase the segregation of disabled children. David Cameron’s denial was later shown to be wrong by Channel 4 FactCheck.

A descendant of Irish farmers on one side and Quaker prison reformer Elizabeth Fry on the other, Jonathan has a passion for social justice and studied Social Policy at London School of Economics. He worked in Parliament on a cross-party basis from 1994-1998 and used that experience in his roles as vice chair of the Electoral Reform Society and vice chair of Yes to Fairer Votes campaign during the 2011 referendum.

He has also served as chair of Centre for Studies on Inclusive Education and helped establish the Accord Coalition with British Humanist Association and teaching unions to reform faith schools. In 2000 Jonathan set up an internet venture that has since raised over £1 million for work in the global South.

In 2015 Jonathan was the General Election candidate for Streatham, increasing the Green vote locally fivefold. A dedicated local activist, he also played a pivotal role in getting the first green councillor elected in Streatham from a starting point of 4th place. In the breakthrough local elections of May 2018 Jonathan was elected as councillor for St Leonard’s ward in Lambeth. With five councillors, the Greens are the official opposition on Lambeth council, for which Jonathan is the Leader.