We have employees who are required to work on some Sundays in the month as part of their contractual working hours. The contract of employment sets out their overall salary amount but does not specify any portion of the salary which is attributable to Sunday working. One of our employees has queried this and has suggested that they are entitled to additional compensation for having to work on Sundays. We are not in the retail sector, which I understand has a specific Code of Practice around Sunday working. In the absence of a Code of Practice for our sector, how do I handle it?

As an employer there is a potential difficulty here from a legal perspective, as the contract