Incident Centres Mr. Biggs-Davison asked the Secretary of State for Northern Ireland on how many occasions use has been made of the incident centres; and by whom. Mr. Merlyn Rees Some 200 reports have been made to Government incident centres by Provisional Sinn Fein and by the security forces. In a number of cases the use of the centres has made it possible to remove misunderstandings which otherwise might have endangered the cease-fire.