R (Iqbal) v Home Secretary
 UKSC 63
The appellants, who all had extant leave to remain in the UK, applied in time for further leave to remain. They could have benefited from section 3C of the Immigration Act 1971 extending their leave until after their applications had been decided and any time for appealing had passed. The Supreme Court considered how this section operates when the application is procedurally invalid for a reason such as the non-payment of the required fee, or the payment of an insufficient fee, or a failure to comply with a request made during consideration of the application for the applicant to enrol biometric information.