"The breach of this implied obligation of trust and confidence may consist of a series of actions on the part of the employer which cumulatively amount to a breach of the term, though each individual incident may not do so. In particular in such a case the last action of the employer which leads to the employee leaving need not itself be a breach of contract; the question is does the cumulative series of acts taken together amount to a breach of the implied term? (See Woods v W. M. Car Services (Peterborough) Ltd[1981] ICR 666 ). This is the 'last straw' situation.
"This case raises another issue of principle which so far as I can ascertain, has not yet been considered by this court. If the employer is in breach of an express term of a contract of employment, of such seriousness that the employee would be justified in leaving and claiming constructive dismissal, but the employee does not leave and accepts the altered terms of employment; and if subsequently a series of actions by the employer might constitute together a breach of the implied obligation of trust and confidence; is the employee then entitled to treat the original action by the employer which was a breach of the express terms of the contract as a part - the start - of the series of actions which, taken together with the employer's other actions, might cumulatively amount to a breach of the implied terms? In my judgment the answer to this question is clearly 'yes'.