Where a trial judge had found that the claimants in a road traffic accident claim had been honest and reliable witnesses, he was entitled to find that it followed from that finding of honesty that there had been a flaw in the uncontroversial evidence of an expert, albeit that he could not identify the error, since there was always a possibility that an expert, particularly in a developing field, could have been wrong.

[2005] EWCA Civ 277