"(4) The prosecution may not appeal in respect of the ruling unless – (a) following the making of the ruling, it – (i) informs the court that it intends to appeal, or (ii) requests an adjournment to consider whether to appeal, and (b) if such an adjournment is granted, it informs the court following the adjournment that it intends to appeal. … (8) The prosecution may not inform the court in accordance with subsection (4) that it intends to appeal, unless, at or before that time, it informs the court that it agrees that, in respect of the offence or each offence which is the subject of the appeal, the defendant in relation to that offence should be acquitted of that offence if either of the conditions mentioned in subsection (9) is fulfilled. (9) Those conditions are – (a) that leave to appeal to the Court of Appeal is not obtained, and (b) that the appeal is abandoned before it is determined by the Court of Appeal."
"(1) An appellant must tell the Crown Court judge of any decision to appeal – (a) immediately after the ruling against which the appellant wants to appeal; or (b) on the expiry of the time to decide whether to appeal allowed under paragraph (2). (2) If an appellant wants time to decide whether to appeal – (a) the appellant must ask the Crown Court judge immediately after the ruling; and (b) the general rule is that the judge must not require the appellant to decide there and then but instead must allow until the next business day."