"1. As Deutsche Morgan Grenfell (UK) Ltd is a subsidiary company, your existing contract of employment with the Deutsche Bank AG will remain during the time of your assignment to Deutsche Morgan Grenfell (UK) Ltd.
"The consecutive posting situation has, of course, to be distinguished from the case where an employee is appointed to a new position involving a significant variation in his contract of employment, as a result of which he is required to work in one particular country unless and until that contract is further varied. In such a case that will be the place and the only place at which he ordinarily works under this contract of employment."