The founder of St Martin’s Theatre, 19th Baron Willoughby de Broke became a theatre manager with the assistance of a friend, Bertie Meyer. The theatre is still in the hands of the Willoughby de Brokes and is one of the few privately owned theatres in the West End.
St Martin’s Theatre's family history suits its quiet 'domestic theatre' history, staging intimate plays. In 1974, The Mousetrap transferred from the Ambassadors Theatre and is synonymous with the record-breaking play, which has been performed over 27,500 times. The building itself was restored in the late 1990s to its original appearance.