Judgment of the Court of 13 January 2004 in Case C-256/01 (Reference for a preliminary ruling from the Court of Appeal (England & Wales) (Civil Division): Debra Allonby v Accrington & Rossendale College, Education Lecturing Services, trading as Protocol Professional, formerly Education Lecturing Services Secretary of State for Education and Employment (Principle of equal pay for men and women — Direct effect — Meaning of worker — Self-employed female lecturer undertaking work presumed to be of equal value to that which is undertaken in the same college by male lecturers who are employees, but under contract with a third company — Self-employed lecturers not eligible for membership of an occupational pension scheme)