Contract change and seniority doesnt count??

[Lincox]

The employee has a contract. He does not wish to increase his hours. He cannot afford to reduce his hours. He has other commitments/another job on the days that he would be off under his existing contract. Royal Mail would also have to prove that there is not only an operational necessity for his hours to be spread over more days, which I believe would be extremely challengable, but that they are unable to accommodate him in other nearby Delivery offices. I believe there would be a very fair chance of constructive dismissal on the basis of what has been the norm for that worker over the past x years.