Many challenges have been brought by or on behalf of part time workers, and the majority of those workers in the labour market are women. For example, a challenge was made on the basis that the statutory qualifying periods denied part time employees access to employment rights and, as a result, discriminated against female employees. (See R v Secretary of State for Employment ex p EOC (1994) and R v Secretary of State for Employment ex p Seymour-Smith and Perez (No 2) (2000).)