"5 Effect of relevant transfer on contracts of employment, etc (1) [Except where objection is made under paragraph (4A) below,] a relevant transfer shall not operate so as to terminate the contract of employment of any person employed by the transferor in the undertaking or part transferred but any such contract which would otherwise have been terminated by the transfer shall have effect after the transfer as if originally made between the person so employed and the transferee. (2) Without prejudice to paragraph (1) above [but subject to paragraph (4A) below], on the completion of a relevant transfer:-
"(4) Under Article 4 the transfer does not by itself justify dismissal by the transferor or transferee unless such dismissal is for economic, technical or organisational reasons entailing changes in the workforce. The employer who dismisses an employee for one of the reasons specified in Article 4(1) can thus justify the dismissal.
"(5) In order to determine whether the only reason for dismissal was the transfer itself, account must be taken of the objective circumstances in which the dismissal occurred, in particular whether it took place on a date close to the transfer and whether the workers concerned were re-engaged by the transferee.
"(6) A dismissal effected before the transfer and solely because of the transfer of the business is in effect prohibited and when considering the application of Article 3(1) is required to be treated as ineffective.
"(7) The crucial question is what is meant by a contract of employment being terminated 'by' a transfer. To answer this question it is necessary to decide what is the effective reason for the termination of the contracts of employment.
"17. Consequently, in so far as national law allows the employment relationship to be altered in a manner unfavourable to employees in situations other than the transfer of an undertaking, in particular as regards their protection against dismissal, such an alternative is not precluded merely because the undertaking has been transferred in the meantime and the agreement has therefore been made with the new employer. Since by virtue of Article 3(1) of the directive the transferee is subrogated to the transferor's rights and obligations under the employment relationship, that relationship may be altered with regard to the transferee to the same extent as it could have been with regard to the transferor, provided that the transfer of the undertaking itself may never constitute the reason for that amendment."
"31. Consequently, the reply to the third question should be that Article 3 of the Directive is to be interpreted as meaning that, upon a transfer, the terms and conditions of the contract of employment or employment relationship relating to wages, in particular those relating to the date of payment and the composition of wages, cannot be altered even if the total amount of the wages remains the same. The Directive does not, however, preclude an alteration of the employment relationship with the new employer in so far as the applicable national law allows such an alteration to be made in situations other than the transfer of an undertaking. Furthermore, the transferee is also bound to continue to observe the terms and conditions of employment agreed in any collective agreement on the same terms applicable to the transferor under that agreement, until the date of termination or expiry of the collective agreement or the entry into force or application of another collective agreement."
"42. For those reasons, the answer to the second part of the second question referred for a preliminary ruling must be that employees unlawfully dismissed by the transferor shortly before the undertaking is transferred and not taken on by the transferee may claim as against the transferee, that their dismissal was unlawful."