"(1) A part-time worker has the right not to be treated by his employer less favourably than the employer treats a comparable full-time worker - (a) as regards the terms of his contract; or (b) by being subjected to any other detriment by any act, or deliberate failure to act, of his employer. (2) The right conferred by paragraph (1) applies only if - (a) the treatment is on the ground that the worker is a part-time worker, and (b) the treatment is not justified on objective grounds. (3) In determining whether a part-time worker has been treated less favourably than a comparable full-time worker the pro rata principle shall be applied unless it is inappropriate."
"Clause 4: Principle of non-discrimination 1. In respect of employment conditions, part-time workers shall not be treated in a less favourable manner than comparable full-time workers solely because they work part time unless different treatment is justified on objective grounds. 2. Where appropriate, the principle of pro rata temporis shall apply. 3. The arrangements for the application of this clause shall be defined by the Member States and/or social partners, having regard to European legislation, national law, collective agreements and practice. 4. Where justified by objective reasons, Member States after consultation of the social partners in accordance with national law, collective agreements or practice and/or social partners may, where appropriate, make access to particular conditions of employment subject to a period of service, time worked or earnings qualification. Qualifications relating to access by part-time workers to particular conditions of employment should be reviewed periodically having regard to the principle of non-discrimination as expressed in Clause 4.1."
"50. … But much more fundamentally I am satisfied on the balance of probabilities that the respondent [sic] has demonstrated the existence of a non-discriminatory reason for the terms enjoyed by both RPTS chairs and VPs. That conclusion enables me to dispose of the reason why defence in respect of all three issues together and is why I have not set out Mr Bourne's [counsel for the Respondents] separate submissions in respect of them. In my judgment the answer to the question what was the cause of the terms and conditions enjoyed by RPTS judges is to be found in the Leggatt Report and the ensuing white paper and it has nothing to do with part-time status. It was to do with the haphazard growth of tribunals and the independence - the drive for greater delegated authority - of ministers and government departments to set the terms and conditions of their own departmental tribunals (and RPTS would have been among the first if not the very first) and the seeming near impossibility of ascertaining what was being paid to other similar office holders because no central data base existed. It was, to borrow a phrase from the white paper, a function of the piecemeal development of terms and conditions reflecting market forces and differing departmental approaches. …"
"4. … The finding (paragraph 50) that the difference was due to the haphazard growth of tribunals and had nothing to do with part-time status arguably misses the point. It has long been the experience of cases of unlawful discrimination that the difference in treatment may be historical. However, that does not, of itself, make it lawful. This point, Mr Engel submitted, was not taken at the Burton hearing …"
"(1) Where a Tribunal considers that two or more claims give rise to common or related issues of fact or law, the Tribunal or the President may make an order specifying one or more of those claims as a lead case and staying, or in Scotland sisting, the other claims ("the related cases"). (2) When the Tribunal makes a decision in respect of the common or related issues it shall send a copy of that decision to each party in each of the related cases and, subject to paragraph (3), that decision shall be binding on each of those parties. (3) Within 28 days after the date on which the Tribunal sent a copy of the decision to a party under paragraph (2), that party may apply in writing for an order that the decision does not apply to, and is not binding on the parties to, a particular related case."