Where a person appeals against conviction on an indictment containing two or more counts and the Court of Appeal allows the appeal in respect of part of the indictment, it may in respect of any count on which he remains convicted pass such sentence, in substitution for the sentence passed thereon at the trial, as it thinks proper and is authorised by law for the offence of which he remains convicted on that count.

On an appeal to the Court against conviction the Court shall, if it thinks that a different sentence should have been passed, quash the sentence passed at the trial and pass such other sentence authorised by law (whether more or less severe) in substitution therefor as it thinks ought to have been passed; but in no case shall any sentence be increased by reason or in consideration of any evidence that was not given at the trial.