The work considers the international and European obligations of the UK in the realm of challenging the far-right and assesses the extent to which it adheres to them. It looks at the role of criminal law in tackling hate speech and hate crime and assesses how English law deals with political parties which may deviate from agreed norms and principles such as non-discrimination. The legal analysis is placed within a contextual framework of far-right parties in the United Kingdom and also incorporates a definitional framework in terms of how the law defines themes relevant to challenging the far-right, such as racial discrimination, terrorism and extremism. The book presents a valuable guide for students, academics and policy-makers in the areas of International Human Rights Law, Criminal Law, Comparative Constitutional Law, National Security Law, Comparative Politics and Terrorism Studies.