How is it that the UK government continues to export weapons to Saudi Arabia for use in the war in Yemen, despite an explicit commitment to international humanitarian law (IHL)? And how is it that the High Court recently dismissed a case of judicial review, confirming that the government was ‘rationally entitled to conclude’ that arms exports pose no clear risk to IHL in Yemen? In what follows, I explain how a flexible interpretation of risk, reliance on secret information, and deference of the Court to the executive serve to facilitate rather than restrict arms exports. The judges’ decision provides a stamp of approval to an arms export policy that has directly contributed to the deaths of thousands of civilians in Yemen. Attention to the Saudi/Yemen case shows the political and legal manoeuvring that goes into managing the contradictions in government arms export policy.