Julie Walters: 'We did this piss-take of Les Miserables, so I used to come in with this operatic voice: 'Oh! Miss Berta and Miss Babs!’ And the lines – I can’t tell you. There was a bit about childbirth, and I had to say, 'Oh, in the war we used to paint condoms on with gravy browning.’ I couldn’t wait to say that every night. Another line – Duncan Preston, who played Mr Clifford, would say, 'I’m just going to log on’. And I’d say, 'Let me see if there’s a clean towel…'