Both the Leader of the Opposition and the Leader of the Labour Party from 2015 until 2020, he is a self-proclaimed democratic socialist who has been recognized for his work as an international human rights campaigner.
He began his political career in 1974 when elected to the Haringey Council. He assumed office as a Member of Parliament for Islington North in June of 1983.
He stepped down as the Chair of Stop the War Coalition in September of 2015.
He was married to Jane Chapman from 1974 to 1979 and Claudia Bracchitta from 1987 to 1999, both ending in divorce. He later married Laura Alvarez in 2013. All three of his sons are from his 2nd marriage.
He served as Leader of the Opposition under British Prime Minister David Cameron.