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 . Despite the convention of maiden speeches being non-controversial , Livingstone alleged that Holroyd had been mistreated when he tried to expose MI5 collusion with Ulster loyalist paramilitaries in the 1970s and the part Captain Robert Nairac is alleged to have played .