Jon Lansman is the founder and creator of Momentum - the grassroots movement which helped propel Jeremy Corbyn to the Labour leadership and has transformed the Labour Party. Jon has been involved in left-wing activism his whole life and speaks movingly about his education, his relationship with Tony Benn and the reason his beard changed. It's an insight into the history of Corbynism and its roots in radical left-wing politics. You can follow Jon on Twitter @jonlansman You can follow Matt on Twitter @mattforde Hosted on Acast. See acast.com/privacy for more information.