Joan Collins first came to public notice in the 1950s, as a Rank starlet and sex kitten. In the 1970s she starred in film adaptations of her younger sister Jackie’s novels The Stud and The Bitch, and in the 1980s as Alexis Carrington in the American soap opera Dynasty. More recently she has reinvented herself, in these pages and elsewhere, as a grande dame and moral arbiter, bemoaning the debased standards and general vulgarity of our times.