Any defendant with a criminal record, who takes the witness-stand, must beware the snares of section 1(f) of the Criminal Evidence Act 1898. The shield this statute confers, once described by Viscount Sankey as “one of the most deeply rooted and jealously guarded principles of our criminal law”, which forbids the prosecution or any co-accused from questioning him on his previous convictions and general bad character, can be forfeited in three ways. An accused may variously adduce evidence of his good character, cast imputations on the character of the prosecutor or the witnesses for the Crown, or give evidence against a co-accused: in each of these circumstances, under sub-provisos (ii) and (iii) of section 1(f), cross-examination of the accused on his bad character then becomes permissible with the leave of the judge. Although there is a frail argument that such evidence may go to issue, the overwhelming preponderance of authority holds