Theatrical producer Sir Cameron Mackintosh, the man behind such smash shows as Les Miserables and Miss Saigon, has pledged to pump £35 million (about $58.25 million) into London’s struggling West End theatre district. Mackintosh, who owns many of the West End’s venues, will significantly revamp six of his properties, and build a whole new 500-seat theatre, to be known as The Sondheim. The pledged amount is thought to be more than 10% of Mackintosh’s estimated personal fortune.