Before the Working Time Regulations 1998 (WTR 1998), SI 1998/1833 came into force, some workers (often low-paid, casual or temporary workers) were not given paid holiday. When WTR 1998, SI 1998/1833 came into force, some employers argued that the existing basic rate of pay for such workers included pay for annual leave under WTR 1998, SI 1998/1833, ie that holiday pay was 'rolled-up' into their normal pay for work done, or increased their workers' basic pay, stating that the increase was paid holiday entitlement. However, rolled-up holiday pay is a disincentive to take holiday because a worker receives