Abstract
This dissertation concerns the enforcement of international labour standards. In particular, it explores the rule against discrimination in work. Many alternative models to the state reporting model, to enforce labour standards, have been suggested; none, however, have explored the codification of those standards of international labour law, which have attained customary status. Accordingly, the thesis of this enquiry is that the rule against discrimination in work, contained within Article 2 ILO Convention C111, is also a rule of customary international law binding on all states. As such, it is a source of the English common law, enforceable in the English courts. Such a thesis draws upon the academic critique of similar projects in other areas and incorporates those concerns, where appropriate, to produce a robust methodology to test this thesis.