 According to Lynda La Plante, on the documentary about the making of  _Prime Suspect (1991) (TV)_ (qv), when she called the Metropolitan  Police (aka Scotland Yard) and enquired as to how many female  DCIs there were on the force, the woman who answered her call said,  "Oh, quite a number! Four!" Jackie Malton appears on the same  documentary, noting that she was one of three DCIs on the force at  that particular time.