"I think my first bout of that was when I was doing me and My Girl, funnily enough. I really didn't change my clothes or answer the phone, but went into the theatre every night and was cheerful and sang the Lambeth Walk. She said: “The only thing I could do was write. I used to crawl from the bedroom to the computer and just sit and write, and then I was alright, because I was not present. “Sense and Sensibility really saved me from going under, I think, in a very nasty way."