Until 1951 Britain’s relationship with Jordan had been founded on the staunch reliability of the kingdom’s first and only ruler. The assassination of Abdullah put British influence in Jordan and its new role for the Arab Legion in doubt. The royal succession was a pivotal moment in Jordanian history. Yet it has hitherto been significantly under-researched. This chapter, therefore, takes a necessary detour away from the primary focus of the Arab Legion. Instead it addresses British involvement in the royal succession crisis created by the assassination of King Abdullah. Aided by a large tranche of recently released documents, this chapter provides the first detailed analsysis of Britain’s approach to the succession crisis. It reveals the extent to which all those interested in Jordanian politics turned to Britain for advice, protection, or support. It also reveals the extent to which Britain sought to maintain influence in Jordan by massaging the royal succession process. Understanding British involvement during this crisis is important in its own right, but it is also crucial to comprehending Britain’s future attitude toward King Hussein and his subsequent dismissal of Glubb.