A physicist gave the Soviet Union the secrets of the bomb and stayed silent about his handlers, yet he found the British Security Service acting as his employment agent upon release.
Atomic secrets were siphoned to Moscow through an academic pipeline of German communists, leaving the British state blind to the penetration of its most sensitive laboratories.
A British security file describes how an economist and an associate steered a physicist toward betrayal, a connection that expedited the Soviet atomic bomb.
Soviet agents used a German economist to compromise the British atomic project, a betrayal tracked in Security Service files categorized as "Soviet Intelligence Agents and Suspected Agents."
Trade delegates and clerks lived double lives as agents, using a commercial facade to infiltrate British secrets while the Security Service watched from the shadows.