The Supreme Court has given judgment in the case of Mirza v Secretary of State for the Home Department  UKSC 63. The case concerned the effect of section 3C of the Immigration Act 1971 as amended and whether it extends leave where an applicant for leave is found later to have made an invalid application. In short, it does not. The appeals were dismissed.
In the course of giving the leading and only judgment, Lord Carnwath expresses dismay at the state of immigration law:
I have found this a troubling case. It is particularly disturbing that the Secretary of State herself has been unable to maintain a consistent view of the meaning of the relevant rules and regulations. The public, and particularly those directly affected by immigration control, are entitled to expect the legislative scheme to be underpinned by a coherent view of their meaning and the policy behind them. I agree with the concluding comments of Elias LJ (para 49) on this aspect, and the “overwhelming need” for rationalisation and simplification.
It is clear too that the Court was concerned at the effect of the judgment, which means that bona fide applicants and their employers or landlords might find themselves criminalised or subject to substantial civil penalties by the accidental use of a wrong form or fee. Nevertheless, the law means what it says and the appeals had to be dismissed.