I apologize for being woefully ignorant of the UK legal system, and the associated terms, but I was under the impression that court was quite formal, with the judge and lawyers (I think they might be called briefs, apologies if I'm wrong) wearing wigs. I was wondering, though... in every episode I have seen in which the Crown prosecutor James Steel appears in court, he wears a wig. For some reason, his backup (or second-in-command, or whatever her proper term is) Alesha Phillips does not wear one. In each episode, the primary defense and prosecution lawyers wore wigs, as did the judge. However, in S03E01, "Broken," neither Steel nor the defense brief Kim Sharkey wore wigs. Is this perhaps because the persons on trial were juveniles? I'm not sure why one would wear a wig in one case and not in another.
Is there anyone here more familiar with the UK legal system than myself that could enlighten me? I would appreciate any responses.