"Whilst it is true that 'frustration', to a lawyer, 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 Davies Contractors Ltd. V Fareham Urban District Council[1956] AC 729 )."
"The next, the sentence of imprisonment for 12 months in June 1971. That, too, was not a breach by him. If he had been given a suspended sentence or put on probation he would not be guilty of any breach of his contract of employment. Nor is it when he is sentenced to 12 months. That was the act of the Court which sentenced him. It was no breach by him. But nevertheless - contrary to the Industrial Relations court - I think there was a frustrating event. The sentence of 12 months' imprisonment frustrated the contract of employment. I know that it was brought about by his own act, namely, the unlawful wounding. In that way it may be said to be 'self-induced'; but still it was a frustrating event."
"So also here where the man committed an unlawful act and was sentenced to 12 months, the event was so unforeseen and the delay so long that the contract of employment was brought automatically to an end when the sentence was imposed."
"In the case of a contract of employment, you must look at the length of time he has been employed, the position which he held, and, of course, most important of all, the length of time which he is likely to be away from his work and unable to perform it - and the importance of getting someone else to do his job meanwhile."