IRA prisoner claims Gerry Adams and Martin McGuinness ordered bombing
SINN Fein has been accused of being in denial about its past after a former IRA prisoner said he was instructed to carry out a bombing by Gerry Adams and Martin McGuinness.
The party has said allegations by Peter Rogers are untrue.
He asked: "How long will they continue their pretence? The terror happened, it is now over.
"They need to admit their part in it, face whatever consequences there may be and move on."
The Sinn Fein president has always denied being in the IRA while Mr McGuinness said he left in the early 1970s.
Mr Campbell said: "The latest revelation from former IRA prisoner Peter Rogers that he had been instructed by Gerry Adams and Martin McGuinness to carry out a bombing in England in 1980 is further evidence of Sinn Fein's attempt to live in denial about their past."
Mr Rogers told the BBC Mr Adams and his Sinn Fein colleague Martin McGuinness ordered him to transport explosives to Great Britain in 1980.
The 69-year-old is a former IRA prisoner who escaped from the Maidstone Prison Ship in 1972.
Eight years later, he was jailed in the Republic of Ireland for the IRA murder of a Garda officer.
Detective Garda Seamus Quaid was shot and killed after his police patrol stopped a vehicle in County Wexford on 13 October 1980. Another officer was injured in the attack.
A Sinn Fein spokesman said: "There is no truth in these allegations. Gerry Adams has already publicly refuted these claims."