This article explores the 1932 visit to India of a delegation of Labour party figures associated with the India League, a prominent anticolonial organisation based in London, charged with investigating the colonial state violence unleashed by ‘Ordinance Rule’. It also examines efforts taken by the Government of India, India Office and Indian Political Intelligence to suppress their findings, through which it explores a dialectic between anticolonial knowledge-making and agnotological imperialism, which often took the form of the latter ‘exceptioning’ examples produced by the former of excessive colonial state violence. It offers the conclusion that the contradictions between liberal imperialism and the rule of colonial difference and repression in the age of mass nationalism in India and mass democracy in Britain meant that liberal imperialism in India increasingly flowed, paradoxically, from illiberalism in Britain.