"31. Mr Adjei accepted that the disability discrimination legislation had an effect on the common law doctrine. He accepted that before the doctrine of frustration can apply in the case of a disabled person so as to terminate the contract of employment by operation of law then the employer must first have complied with any duty to make reasonable adjustments as required by theEquality Act 2010 , and despite those adjustments the further performance of the obligations in the future would be a thing radically different from that originally agreed. That formulation is based on the question set out in Marshall. 32. In our judgment that formulation is an accurate representation of the law. It cannot be right that in circumstances where an employee suffers a severe disability then it is possible for an employer to avoid the obligations under the disability discrimination [legislation] by relying on frustration, but cannot do so where the effect of the disability may be less severe. The statutory obligations must apply, although it may be that in fact there are not any adjustments which could be made to benefit the employee. The logical conclusion therefore is that the Tribunal must first consider the issue relating to reasonable adjustments."
"An employer (A) must not discriminate against an employee of A's (B)- (c) by dismissing B; (d) by subjecting B to any other detriment."
"Whilst it is true that "frustration" to lawyers can have a technical meaning (although they, too, are often "frustrated" in the popular sense), there is nothing technical about the idea that a contract should cease to bind the parties if, through no fault of either of them, unprovided for circumstances arise in which a contractual obligation becomes impossible of performance or in which performance of the obligation would be rendered a thing radically different from that which was undertaken by the contract. Yet this is all that the lawyer means by "frustration" of a contract, and the words which we have just used are not in essence ours but those of that very great lawyer, Lord Radcliffe: see Davis Contractors Ltd v Fareham Urban District Council[1956] AC 696 , 729… In the context of incapacity due to sickness, the question of whether or not the relationship has come to an end by frustration sounds more difficult than it is. The tribunal must ask itself: 'Was the employee's incapacity, looked at before the purported dismissal, of such a nature, or did it appear likely to continue for such a period, that further performance of his obligations in the future would either be impossible or would be a thing radically different from that undertaken by him and agreed to be accepted by the employer under the agreed terms of his employment?'"
"In this case we begin with a point of principle raised by Mr Brown. He submits that when considering whether or not a contract of employment has been frustrated, rather than terminated by one of the parties, there must be grafted on to the guidance provided in earlier cases beginning with the judgment of Sir John Donaldson in Marshall v. Holland and Wolf[1972] ICR 101 (National Industrial Relations Court), a case to which this Tribunal referred and followed in their reasons, the statutory obligations now imposed on employers by the DDA and in particular the duty to make reasonable adjustments under section 6. 12. We see the force of that submission as a matter of general principle. Just as, to take another example in modern employment law given by Mr Brown, parties to a contract of employment can reasonably foresee that a female employee may become pregnant and take statutory maternity leave, it could not in these circumstances be argued that during the period of such maternity leave the contract was frustrated and so ended. Similarly, we accept and Miss Ellenbogen does not argue to the contrary, that where reasonable adjustments will allow the employee to return to work, that is a relevant factor in determining whether or not the contract has been frustrated."