 Judge Peter Cory stated in his report that the Provisional IRA had developed sophisticated intelligence-gathering techniques which enabled them to monitor the telephone calls and radio transmissions of the RUC and British Army.Less than two years before the Jonesborough ambush, the IRA detonated a remote-controlled car bomb which killed Lord Justice of Appeal Sir Maurice Gibson and his wife, Cecily, Lady Gibson as they were returning home from a holiday.The couple was blown up shortly after their car crossed the Northern Ireland border on the main Dublin-Belfast road.