In his maiden speech to Parliament in July 1987, Livingstone used Parliamentary privilege to raise a number of allegations made by Fred Holroyd, a former MI6 operative in Northern Ireland. Despite the convention of maiden speeches being non-controversial, Livingstone alleged that Holroyd had been mistreated when he tried to expose MI5 collusion with loyalist paramilitaries in the 1970s and the part Captain Robert Nairac is alleged to have played. He also voiced Colin Wallace's allegations of MI5 dirty tricks levelled at Harold Wilson, part of what became known as the "Wilson plot".