Three hour-long plays, two intervals, three men in black frock-coats explain some financial history in a revolving glass box in front of a projected, mainly monochrome, cyclorama. When The Lehman Trilogy triumphed at the National Theatre in 2018 I wrote “this show has no right to be so much fun”. Recast and home again, it still is a treat after waltzing Broadway and LA and winning a Tony for Best Play.