For all categories of worker, including those on zero hours contracts, paid holiday entitlement is determined in accordance with the relevant provisions of the Working Time Regulations 1998 (WTR 1998), SI 1998/1833, and sections 221–224 of the Employment Rights Act 1996 (ERA 1996). See Practice Note: Statutory paid holiday—the right. Holiday pay must be paid at the rate of a week's pay for each week of leave. As a zero hours employee or worker will have no normal working hours, a week's pay is calculated, under ERA 1996, s 224 and WTR 1998, SI 1998/1833, reg 16(3)(e), as the average weekly remuneration (ie, for the average weekly normal hours at the average hourly rate) over the previous 52 working weeks (or, if the employee has been employed for a lesser period, to the period of complete weeks for which they have been employed), counting backwards from the first day