Holidays Act 2003, ss 19, 29–35
Your employer can require you to take your annual holidays at a particular time, if:
you’re unable to reach agreement on the timing of annual holidays, or
your workplace has an annual closedown period.
A closedown period is a period when an employer usually closes the workplace and requires employees to take all or some of their annual holidays (for example, when a business closes over the Christmas/New Year period).
Your employer must give you at least 14 days’ notice if you’ll be required to take annual holidays at a particular time.