This article focuses on Anglo-French security and defence collaboration. It begins by setting out the lack of UK-French security cooperation in Africa from the colonial to the early post-Cold War era. It then shows how there has been a degree of institutionalization of Anglo-French relations, alongside greater cooperation in terms of European Security and Defence Policy missions and the training of African peacekeepers. Next, this study explains the recent evolution of UK-French security relations in terms of neo-classical realist theory. Finally, it assesses the likelihood of closer Anglo-French security collaboration in the future.