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It was not an illusory consideration, as she gave up her right to behave in disorderly
conduct (something she was legally able, but not obligated to )
Public duties & consideration
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Glasbrook Bros v Glamorgan County Council
●
This case considered whether or not performance of an existing duty could constitute
good consideration
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Glasbrook sought police protection from Glamorgan county during a strike by its coal
miners
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Glamorgan requested payment for additional service of the garrison, but Glasbrook
refused to pay, arguing that the police were merely performing a public duty( therefore
they, as the offeree in this case, did not provide consideration)
●
But the court held that Glamorgan provided good consideration as provision of the
garrison was additional protection above & beyond the public duty that the police were
obligated to provide
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Thus, performance of public duty is not good consideration
●
But performance of more than required by a public duty is good consideration
Past consideration / Spent consideration
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In order for consideration to be valid, it must be co-extensive with the promise of the
other party
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Something you have done before in the past, prior to entering the contract, cannot be
offered as good consideration for a promise
●
Roscorla v Thomas
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Roscorla bought a horse from Thomas for 30 pounds
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After the purchase, Thomas promised Roscorla that the horse was "sound & free from
vice"
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In reality, the horse had a very bad temper & was vicious
●
Roscorla then sued Thomas for a breach of contract
●
The court held that there is no breach of contract, because the promise regarding the
horse's state was not supported by consideration from Roscorla's part
●
The consideration ( 30 pounds) was paid before the warranty of the horse. It was spent
on the initial contract for the purchase, and thus, no longer available for the subsequent
warranty
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Therefore the warranty was not legally binding.
*For this case, Roscorla should have made the state of the horse as a term of the contract.
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Stewart v Casey
Pre-existing contractual duty