This article explores traditional conceptions of non-justiciability in British Courts in honour of Francis Mann. It highlights the move by domestic courts away from traditional ‘no-go’ areas towards a more nuanced and balanced understanding of the respective roles and competences of the executive and the judiciary; and sees this as a not unfavourable development in an era when domestic recourse is often the only practicable means by which an individual, as opposed to a State, may obtain redress for alleged misconduct on the international plane.