Immigration – Leave to remain. The Supreme Court, in upholding the Court of Appeal, Civil Division's construction of s 3C of the Immigration Act 1971, dismissed the appellants' appeal against the Court of Appeal's decision that an application for leave to remain in the United Kingdom had to be one which had been validly made in accordance with the relevant immigration rules. In ordinary language, an application which was not validly made, as in the present case due to procedural defects, could have no substantive effect.