The West End musical Charlie and the Chocolate Factory, currently running at the Theatre Royal, Drury Lane, tweeted, "Due to incident at Holborn, tonight’s 7.30 PM performance has been CANCELLED." The Play That Goes Wrong, playing at the Duchess Theatre, made light work of their own announcement: "It may seem like an April Fool's joke (and you know what we're like!), but tonight's performance is most definitely cancelled #sorry" On the website for The Lion King, playing at the Lyceum Theatre, an update stated, "Due to circumstances beyond our control, we have been left with no option than to cancel this evening’s performance."
The Royal Opera House, where a production of Brecht and Weill's The Rise and Fall of the City of Mahagonny is playing and is being broadcast live to cinemas tonight, stated that the performance "will go ahead, although due to some loss of power at Holborn, we are unable to provide any bar or restaurant services tonight."
There has been no coordinated policy for what is and isn't playing, with the Society of London Theatre — the trade body who represent West End theatre owners and producers — advising on their website, "A number of theatres have been affected by the electrical fire in Holborn and the surrounding areas. The current advice for anyone with tickets for a performance tonight in the West End is to call the box office directly."