Michael Billington on working-class theatre
'Where have all the kitchen sinks gone?'Is our theatre now inescapably middle-class? I ask because I recently took part in a debate on Radio 3's Night Waves about the upsurge in working-class plays and movies that took place in the late 1950s and early 60s. Like my fellow panellist Ken Loach, I questioned the use of the term "kitchen sink". But one can only look back in awe at a period that produced pl…