Union Theatre, London

The Union Theatre is a fringe theatre in Southwark, London. It sits beneath railway arches near Southwark station, occupying a former paper warehouse that Sasha Regan converted in 1998. The space once faced closure when Network Rail planned to redevelop the site, but a campaign saved it. After nearly twenty years in its original location, the theatre moved across the road to new Network Rail premises in 2016. The building retains its theatrical character while offering improved facilities. The theatre is known for staging musicals and has hosted notable productions. Stephen Sondheim’s *Sweeney Todd* and *Assassins* premiered there in 2008. An all-male version of Gilbert and Sullivan’s *The Mikado* also played in 2008. The 2009 musical *A Man of No Importance* transferred to the West End’s Arts Theatre. The 2010 London premiere of *Once Upon a Time at the Adelphi* further established its reputation. Visitors find a restaurant, rehearsal rooms, and tiered seating in the new space. The theatre’s original arches remain part of its identity. Productions continue to draw audiences with fresh interpretations of classic works. The surroundings include nearby businesses that survived the relocation campaign. The Union Theatre remains a distinctive venue in London’s fringe theatre scene.