Bad Character Evidence in UK Law

When evidence of good or bad character is given, it should be directed to that sector of a man's character which is relevant. Thus, if the libel imputes theft, the relevant sector is his character for honesty, not his character as a motorist. It is for the Judge to rule what is the relevant sector.

Where evidence of bad character is introduced the jury should be given assistance as to its relevance that is tailored to the facts of the individual case. Relevance can normally be deduced by the application of common sense. The summing up that assists the jury with the relevance of bad character evidence will accord with common sense and assist them to avoid prejudice that is at odds with this.

What the summing-up must contain is a clear warning to the jury against placing undue reliance on previous convictions, which cannot, by themselves, prove guilt. It should be explained why the jury has heard the evidence and the ways in which it is relevant to and may help their decision, bearing in mind that relevance will depend primarily, though not always exclusively, on the gateway in section 101(1) of the Criminal Justice Act 2003, through which the evidence has been admitted.

The jury had to decide whether the two appellants were the two young men who committed the offence. The evidence of bad character was capable of establishing that they had a propensity to commit an offence of street violence, and to do so together. That evidence was capable of lending support to the conclusion which the Crown invited the jury to reach, namely that the two appellants were correctly identified as those who committed the attack.

Our final general observation is that, in any case in which evidence of bad character is admitted to show propensity, whether to commit offences or to be untruthful the judge in summing-up should warn the jury clearly against placing undue reliance on previous convictions. Evidence of bad character cannot be used simply to bolster a weak case, or to prejudice the minds of a jury against a defendant.

The test must be—is the evidence capable of tending to persuade a reasonable jury of the accused's guilt on some ground other than his bad character and disposition to commit the sort of crime with which he is charged? The similarity would have to be so unique or striking that common sense makes it inexplicable on the basis of coincidence.

In the context of section 100 of the2003 Act, we think that the word “substantial” must mean that the evidence concerned has something more than trivial probative value but it is not necessarily of conclusive probative value.