The respondents were shift workers employed by the appellant. During a particular week, they worked the 10:00 pm to 6:00 am shift from Monday until Saturday, 8 November 1997. At the end of their Saturday shift, they received orders to report for work on Sunday for five hours. The respondents regarded this order as unlawful, believing it infringed on their statutory right to one day off per week and contravened previous practice where they were never required to make up hours not worked in a particular week. The respondents disobeyed the order and were summarily dismissed for insubordination or failure to obey a lawful order, in accordance with the appellant's Code of Conduct. Under the Milling Industry Employment Regulations (SI 668/83), shift workers were required to work not more than 45 hours per week. The respondents' eight-hour shifts translated to 40 hours for five days (Monday to Friday). The appellant ordered them to work five additional hours on Sunday to complete their regulated 45-hour working week.