"(1) Where an employer is proposing to dismiss as redundant 20 or more employees at one establishment within a period of 90 days or less, the employer shall consult about the dismissals all the persons who are appropriate representatives of any of the employees who may be so dismissed."
"… the term 'establishment' appearing in Article 1(1)(a) of the Directive must be understood as meaning, depending on the circumstances, the unit to which the workers made redundant are assigned to carry out their duties. It is not essential, in order for there to be an 'establishment', for the unit in question to be endowed with a management which can independently effect collective redundancies."