This article is not part of the Holby universe. This article covers a subject that is part of the real world, and thus should not be taken as a part of the Holby universe. John Killoran is an actor. He portrayed Roy Ellisson on Casualty in 2015 and 2017. Retrieved from "https://holby.fandom.com/wiki/John_Killoran?oldid=102848" Categories: Real world articles Actors/Actresses Community content is available under CC-BY-SA unless otherwise noted.