Daily Mail: Oxford academic ‘Agent Marta’ fed Czechoslovak spies nuclear secrets

Oxford University academic and leading nuclear scientist Jiřina Stone spent years handing over nuclear intelligence in clandestine meetings with spies from her native Czechoslovakia after emigrating to Britain in the mid-1980s, the Daily Mail reports.

According to a dossier of newly declassified files from the Security Services archive in Prague, “Agent Marta” was a valued asset. When contacted by the Mail, Stone emphatically denied having been a spy, saying she “played” the agents, giving them only inconsequential information.