This article focuses on the interaction between the Australian and British governments during the early 1970s over French nuclear testing in the South Pacific. It examines the considerations behind the Australian government's approach to Britain, and Britain's response to initiatives from Australia. Through the presentation of a case study demonstrating how Australia's Pacific interests and Britain's European concerns inevitably led to different perspectives, I argue that the policies of both countries were primarily determined by their consideration of regional geopolitical interests, rather than the lingering links of Empire.