Daphne Park with MI6 colleague Hugo Herbert-Jones on route to Stanleyville (now Kisangani) in the Congo in 1960/61. Five officers in total took part in the operation, the nature of which remains undisclosed. Photograph: courtesy of Sarah Herbert-Jones

Queen of Spies is the biography of the late Baroness Daphne Park (1921-2010), a senior controller in Britain’s Secret Intelligence Service, popularly (...)