Her television work began with Ken Loach's once controversial Up The Junction (1965) for the BBC's Wednesday play series. She acted in many of the more famous British plays and films of the 1960s. The plays she wrote for the BBC's Thirty-Minute Theatre series were "Keep on Running" and "Magnolia Summer" and for The Wednesday Play "Kippers & Curtains".
In 1969 she met Warren Oates while filming Crooks and Coronets and they married. They were divorced in 1974. She was also a successful novelist and her published novels included Focussing, Lovers of Africa (Love & Hunger in the USA), The Testimony of Daniel Pagels and Delicate Matters. Vickery's fifth novel - Lost Heir - was scheduled to be published around the time of her death.