Where a party continues to trade under a contract terminable on reasonable notice for an extended period (here over 7 years) after being notified of changed terms, their conduct may constitute assent to a variation of the contract, even where they initially protested the changes.
The full text is available to signed-in members, including the 32 later cases that cite this judgment.
3 of the 32 citing cases carry a classified treatment. How each court treated it is available to signed-in members.