'What did you do to them Klaus?': The Klaus Fuchs Atomic Espionage Case and its Impact on the Scientific Community in early Cold War Britain.

The atomic spy, Klaus Fuchs, was one of the most notorious figures of the early Cold War. The story of his espionage and the impact it had has been the subject of extensive historical research. This article provides a new angle on the Fuchs case by examining the repercussions of his actions on his friends, colleagues, and the wider scientific community in Britain that have previously been overlooked. It argues that the subsequent fall-out led several atomic scientists to have their own loyalties questioned and be subjected to extensive and sustained surveillance. As the article will show, the inevitable era of suspicion that the Fuchs case ushered in did damage to the reputations, careers, and prospects of certain scientists. By examining the repercussions, the article helps to provide a first insight into the experience of some British scientists during the early years of the Cold War.