If they are office folks, then the company will almost certainly be encourgaing folk to go. There will be a fair amount of duplication and any merged company will want to lose that as fast as possible - both to save money and to try and build a new team from those that choose to stay.
Further, office folk are less specialised and less likely to want to move from STN to LTN for the sake of the job. Just speculation based on 22 years in commerce.