In Sharma and others v Manchester City Council [2008] IRLR 336, the EAT held that part-time status does not need to be the sole reason for less favourable treatment, as compared to that of a full-time worker, for a complaint of unlawful discrimination to succeed.
In Voss v Land Berlin C-300/06, the ECJ ruled that legislation under which overtime pay arrangements result in a part-timer being paid less overall than a comparable full-timer for the same number of hours potentially contravenes the principle of equal pay enshrined in art. 141 of the Treaty establishing the European Community.
In McMenemy v Capita Business Services Ltd [2007] IRLR 400 CS the Court of Session held that an employer that did not award time off in lieu of bank holidays to a part-time employee who did not work on Mondays was not in breach of the part-time worker Regulations.
In Matthews and others v Kent & Medway Towns Fire Authority and others [2006] UKHL 8, the House of Lords held that in the assessment of whether full- and part-time workers are employed on broadly similar work, both the differences and the similarities between the two groups should be considered and an overall assessment made.