In 2011, the BALPA pilots’ union won a key ruling in the ECJ on behalf of British Airways pilots (Williams v British Airways [2011] EUECJ C-155/10) which concerned the calculation of holiday pay. Although the ruling was made under the Civil Aviation (Working Time) Regulations 2004, the wording of these regulations was the same as that of the general WTD. As such, the ruling has had important implications for the rights of all workers to statutory holiday under the WTD, beyond the airline industry.