An employer's failure to ban smoking in a poorly ventilated workplace, after it became clear that measures already introduced to resolve the problem of passive smoking were inadequate, was in repudiatory breach of an implied contractual term that it would provide and monitor for its employees, so far as reasonably practicable, a working environment which was reasonably suitable for the performance of their contractual duties, holds the EAT in Waltons & Morse v Dorrington.