Urban I (Blonk Street) Ltd v Ayres and another: [2013] EWCA Civ 816; [2013] WLR (D) 271
“Where, in the case of a time provision which was an innominate term, a completion notice had not been served on the contract-breaker, the other party only became entitled to terminate the contract thereafter if and when the delay was such as to go to the root of the contract, that was to say it deprived the other party of substantially the whole benefit which it was intended it should have under the contract.”
WLR Daily, 5th July 2013
Source: www.iclr.co.uk