"…if a worker is in fact engaged in the activities of the whole business or in several parts then he cannot be regarded for the purpose of the Directive as an employee 'of' the part of the business transferred. Practical considerations, it seems to me, compel this result. An employee who works at several factories on e.g. maintenance or personnel work, or as a salesman for the whole range of products of the business, would otherwise be able to claim that he was transferred to the new owner of part only of the business. His job would then be very different in its scope and maybe even in its place. That would seem contrary to the aim of the Directive which is to make a transfer of employment which is in all respects identical save as to the employer. Equally, if two parts of the business were transferred respectively to different transferees, and another part were retained, the employee who worked in both or in a general department such as maintenance or accounts or sales, would, in theory, be able to claim that he had been transferred to each or at any rate to claim an option. That option does not seem to me to be conferred by the Directive. There may be borderline cases, but it seems to me essential to reduce these to the minimum by having a clearly workable test. It is possible that in an exceptional case part of the business may be sold in which it cannot be said that there are any workers who are wholly engaged in that part. This, however, has to be accepted and seems likely to be an infrequent occurrence. Conversely, subject to reliance on Article 4 of the Directive, the part transferred must take with it all the employees who are wholly employed in it."