By Daniel Bird Martin McCallum has died at the age of 73, the Society of London Theatre (SOLT) announced. The British theatre director whose career spanned more than 500 productions and included becoming president of SOLT, died “peacefully surrounded by his family” on January 14. McCallum worked with Sir Cameron Mackintosh on Cats, Les Miserables and The Phantom Of The Opera In a statement, they said: “The Society of London Theatre mourns the loss of an incredible pioneer and cherished friend, Martin McCallum (6 April 1950 – 14 January 2024), FRSA, who passed away peacefully surrounded by his …