In a commercial lease termination clause triggered by streets being 'significantly altered', the word 'significantly' imports a requirement of adverse economic effect on the lessee's business, not merely a major or substantial physical change to the road. A road alteration that is neutral or beneficial to the lessee's business does not trigger the right to terminate. The precise formulation of the test (economic disadvantage to the lessee vs objective detriment to the site for the permitted use) was not unanimously resolved.
The full text is available to signed-in members, including the 4 later cases that cite this judgment.