Parker v Clark [1960] 1 WLR 286 is an English contract law case concerning reliance and creation of legal relations in a social type of agreement.
The Clarks, an elderly couple, invited their niece and her husband, the Parkers to live with them.
The Parkers sold their house, lent the balance of the money to their daughter who in turn bought a flat.
The Clarks asked them to leave, and the Parkers sued for breach of contract.
I cannot believe… that the defendant really thought the law would leave him at liberty, if he so chose, to tell the [claimants] when they arrived that he had changed his mind, that they could take their furniture away, and that he was indifferent whether they found anywhere else to live or not.