‘Malcolm, have you been to the set? I’ve never seen so much cock in all my life! Oh do tell me if you think they’re pubescent or shaved!’ Malcolm McDowell’s on-stage memoir about his cinematic mentor may be billed as a tribute to Lindsay Anderson, but it’s his account of John Gielgud’s excitement while filming Caligula (recently released uncut for the first time in the UK) which raises the …