This chapter looks at the background to the Working Time Regulations, the core working time rights and the specifics of the law. It then considers some of the arguments that have been raised both for and against such regulation. The Working Time Regulations regulate daily rest, weekly working time, weekly rest and annual leave, among other matters. The maximum weekly working time is forty-eight hours, but the UK has retained an opt-out to this, so a person can agree to work more hours. The opt-out remains extremely controversial amongst fellow European Member States. The chapter also considers remedies if the rights are breached.