Pictured: Ronan O’Rahilly

Matthew Bannister on

Ronan O’Rahilly, the Irish businessman who ran the pirate radio station Radio Caroline on a ship off the coast of Essex.

Sir John Houghton, the atmospheric physicist who was Director of the Met Office and co-chair of the Inter-Governmental Panel on Climate Change.

Sue Davies, who founded and ran the Photographers' Gallery in London, supporting the careers of many leading photographers.

Barbara Smoker, the outspoken atheist and anarchist who was President of the National Secular Society.

Interviewed guest: Ray Clark

Interviewed guest: Hannah MalcolmInterviewed guest: Dave RobertsInterviewed guest: Paul HardakerInterviewed guest: Amanda HopkinsonInterviewed guest: Chris Steele-PerkinsInterviewed guest: Professor Anthony CostelloInterviewed guest: Denis Cobell

Producer: Neil George

Archive clips from: Arena: Caroline 199: A Pirate's Tale, BBC Two 01/03/1991; The Story of Pop, Radio 1 26/01/1974; Ray Clark on Radio Caroline 1987; Belief, Radio 3 10/06/2012; Interview with Sue Davies, courtesy of The Photographers’ Gallery; Seeds of Faith, Radio 4 14/07/1996; Today, Radio 4 16/12/2002.