Irish hero Gerry Conlon. Photograph: Ian Cook/Time & Life Pictures/Getty Image

Protesters outside the Old Bailey ahead of the release of the Guildford Four. Photograph: Bill Cross/Associated Newspapers/REX

Conlon with his two sisters as he is released after 15 years of wrongful imprisonment. Photograph: Keystone USA/REX

Gerry Conlon cheers as he is released from the Old Bailey. Photograph: Ted Blackbrow/Daily Mail/REX

Police escort members of the Guildford Four's families after Conlon's release from the Old Bailey. Photograph: Bill Cross/Associated Newspapers/REX

Daniel Day-Lewis plays Conlon in a film based on the Guilford Four, In the Name of The Father. Photograph: Allstar/Sportsphoto Ltd.

Gerry Conlon outside the House of Commons in 2005, showing the media the letter of apology he received from the prime minister, Tony Blair, for him being wrongly convicted of the Guildford pub bombings.Photograph: Stefan Rousseau/PA

Gerry Conlon speaks in front of parliament during a demonstration in support of legal aid on 22 May 2013 in London. Photograph: Peter Macdiarmid/Getty Images