The origins and implications of contractual estoppel

Considers how case law arising from disputes related to the global financial crisis of 2008-09 has developed the doctrine of "contractual estoppel". Examines the concerns expressed by judges and commentators over: (1) whether contractual estoppel is a legitimate form of estoppel; and (2) the risk of "contagion" from cases involving sophisticated financial investors to consumer contract, or more ordinary business contract, scenarios.