One of the unusual things about this case (compared with the likes of Huntley, Hazell et al) is that all we've seen of Bridger is a few still photographs and that one distant video clip of him walking with the dog. We've never heard him speak or had the opportunity of studying his body language.
So it's very telling that the jury had no doubts at all of his guilt. The BBC reporter has been describing the reactions of the jury and others in court to Bridger's evidence - looking at each other open-mouthed with incredulity, their expressions showing total disbelief.