This article covers a real-world subject which should not be taken as part of the Holby universe.
"The Sunny Side of the Street - Part Two" is the 559th episode of Casualty and the 18th episode of the 21st series.
Synopsis[]
Prostitutes and punters make a desperate bid to escape as fire rages at the brothel. While staff at the hospital are alerted to the incident, Guppy provides back-up at the scene and treats an injured man inside the burning building following Maggie's instructions over the phone.