Evidence of misconduct by a defendant was evidence “to do with” the alleged facts of the offence with which the defendant was charged and therefore excluded from the definition of bad character in s 98(a) of the Criminal Justice Act 2003, if it had some nexus in time with that offence.
Cases in which a breach of procedural rules would entitle a court to exclude evidence of substantial probative value would be rare and a court should be most reluctant to exclude evidence of that quality for such a breach; none the less there would be cases where the only way in which the court could ensure fairness was by doing so.