This paper analyses aspects of socially organised conflict from an ethnomethodological point of view. In particular it examines the accomplishment of activities between civil and military Air Traffic Control operations at London’s Air Traffic Control Centre. It will be shown how civilian controllers orient to, take account of, and manifest the interface of military and civilian operations in such a way as for that interface to be perceived and treated by controllers themselves as conflicting. Examples will be taken from observed decision making relating to military rogue planes. Some remarks as to the history of ethnomethodological examination of accomplished conflict are made and proposals for the respecification of conflict as an analytic object for the sociology of work exposited.

