She works primarily in black-and-white, using available light. She has photographed hundreds of subjects, including Woody Allen, Samuel Beckett, Sir John Betjeman, Cilla Black, Quentin Crisp, P. J. Harvey, John Lennon, Richard Nixon, the gangster Charlie Richardson, Field Marshal Sir Gerald Templer, Margaret Thatcher, and Orson Welles.
She was born in Dorset, and first worked as a chart corrector, which included a role in plotting the D-Day invasion. She studied photography at Guildford College. She started out as a child portrait photographer, but got her big break when she received a telegram in 1949 from an Observer editor, asking her to photograph the philosopher Bertrand Russell.
In 1985, she was awarded an MBE and in 1995, she was "upgraded" to the CBE.