“3C Continuation of leave pending variation decision (1) This section applies if— (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. (2) The leave is extended by virtue of this section during any period when— (a) the application for variation is neither decided nor withdrawn, (b) an appeal undersection 82(1) of the Nationality, Asylum and Immigration Act 2002 could be brought, while the appellant is in the United Kingdom against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). (3) … (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.
“104 Pending appeal (1) An appeal under section 82(1) is pending during the period— (a) beginning when it is instituted, and (b) ending when it is finally determined, withdrawn or abandoned (or when it lapses under section 99).”
“17. Withdrawal of appeal (1) An appellant may withdraw an appeal- (a) orally, at a hearing; or (b) at any time, by filing written notice with the Tribunal. (2) … (2A) … (3) If an appeal is withdrawn or treated as withdrawn, the Tribunal must serve on the parties a notice that the appeal has been recorded as having been withdrawn.”
““date of application” means the date of application determined in accordance with paragraph 30 or 34G of these rules as appropriate.” “30 [Not relevant]” “Determination of the date of an application or claim (or variation of an application or claim) in connection with immigration. 34G For the purposes of these rules, the date on which an application or claim (or a variation in accordance with para 34E) is made is as follows: (i) where the application form is sent by post, the date of posting, (ii) …”