If Anglo-American atomic cooperation had continued

How might the early Cold War have changed if the United States had honored its wartime atomic agreement with Britain?

Britain could have possessed an operational bomb and facilities by about 1947, deepening Anglo-American trust and placing a second Western nuclear power ahead of the Soviet test.

Continued wartime cooperation could have given Britain an operational weapon and supporting facilities by roughly 1947, before the Soviet Union's first test. Honoring the agreement would also have avoided a serious breach of trust between London and Washington. The likely result would be a more integrated early Cold War partnership as well as an earlier date for British nuclear capability.