Guildford Four
Overview
The Guildford Four and the Maguire Seven were two sets of people whose convictions in English courts for the Guildford pub bombings in the 1970s were eventually quashed. The Guildford Four were convicted of bombings carried out by the Provisional Irish Republican Army
Provisional Irish Republican Army
The Provisional Irish Republican Army is an Irish republican paramilitary organisation whose aim was to remove Northern Ireland from the United Kingdom and bring about a socialist republic within a united Ireland by force of arms and political persuasion...

 (IRA), and the Maguire Seven were convicted of handling explosives found during the investigation into the bombings. Both groups' convictions were declared "unsafe and unsatisfactory"
and reversed after they had served time in prison.
The Guildford Four were charged with direct involvement with the IRA attacks.
 
x
OK