Kenny Wax: ‘I’m not interested in the most profit – I want to be there in 10 years’ time’

With a roster of West End hits to his name, producer Kenny Wax knows what makes Theatreland tick. As hit comedy The Play That Goes Wrong celebrates a decade in the West End, he tells Matthew Hemley about the reality of staging and touring shows, from balancing the books to building longevity and changing with the times