"Section 3C. Continuation of leave pending variation decision. (a) a person who has limited leave to enter or remain in the United Kingdom applies to the Secretary of State for variation of the leave, (b) the application for variation is made before the leave expires and (c) the leave expires without the application for variation having been decided. (a) the application for variation is neither decided nor withdrawn, (b) an appeal undersection 82(1) of the Nationality, Immigration and Asylum Act 1992 could be brought while the appellant is in the United Kingdom against the decision on the application for variation (ignoring any possibility of an appeal out of time with permission) or (c) an appeal under that section against that decision brought while the appellant is in the United Kingdom is pending (within the meaning of section 104 of that Act). (4) A person may not make an application for variation of his leave to enter or remain in the United Kingdom while that leave is extended by virtue of this section.
"Although a right of appeal exists only if there was a valid application, what the Secretary of State has done at various stages in this litigation is to treat the application as a valid application.....That was itself a valid executive decision by the Secretary of State and we think it would be entirely inappropriate for that decision now to be reversed."