This appeal from the EAT concerns time limits in a dispute about their interpretation and their application to a complaint brought by an employee, Mr John Arthur, under the Public Interest Disclosure provisions of the Employment Rights Act 1996 against his employer, London Eastern Railway (T/A One Stansted Express) for subjecting him to detriment on the ground that he made protected disclosures. At a pre-hearing review the chairman of the employment tribunal ruled that most of the acts (and failures), on which Mr John Arthur based his complaint of detriment, were out of time.