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. Barbara Machin is a writer. She has written 17 episodes of Casualty since 1990. Retrieved from "https://holby.fandom.com/wiki/Barbara_Machin?oldid=99738" Categories: Real world articles Community content is available under CC-BY-SA unless otherwise noted.