Yes, as long as there is no clause in your contract that states that you have freedom to allocate your own holidays. They must give reasonable notice that they are doing so.
We get 27 days but one day must be good friday, one must be the Tuesday after Easter and Christmas can be 3 or 4 days (but they have to tell us in September)
We get 27 days but one day must be good friday, one must be the Tuesday after Easter and Christmas can be 3 or 4 days (but they have to tell us in September)