In Lyons v Mitie Security Ltd EAT/0081/09, the EAT held that, in principle, the ability to take annual leave is not inalienable and can be lost if the worker does not comply with the notice requirements imposed by the Working Time Regulations 1998 and/or the worker's contract. However, the tribunal had erred in failing to analyse properly whether or not the particular notice requirements of the claimant's contract had been complied with, before deciding to dismiss his constructive dismissal and holiday pay claims.