The Northern Ireland Court of Appeal has held that there is no reason in principle why voluntary overtime should not be included in holiday pay, if it is normally carried out and is an "appropriately permanent feature" of the worker's remuneration.
In Bear Scotland Ltd and others v Fulton and others; Hertel (UK) Ltd v Woods and others; Amec Group Ltd v Law and others [2015] IRLR 15 EAT, the EAT held that payment in respect of overtime that the worker is obliged to work when it is available, but that is not guaranteed by the employer, constitutes part of the worker's normal remuneration and as such should be included in the computation of the worker's holiday pay.