In 1988 IRA terrorist Sean O'Callaghan walked into a Tunbridge Wells police station and gave himself up. Two years later, in a Belfast courtroom, he pleaded guilty to all charges of which he was accused and received a sentence of 539 years. Since being a teenager he had been an active member of the IRA and had risen to be the head of their Southern Command. He was responsible for two murders and many terrorist attacks. He was a linchpin of the...