Some comments and suggestions
I've just seen the Pilot, and so far I haven't been knocked over. The show seems to regard silk-ness as the most important issue in a barrister's life--it's as if a detective show revolved around the question "Will this case hurt or enhance my chances to become a DCI?" instead of Whodunnit?, or a medical or corporate show revolved around the question "Will this hurt or enhance my chances for a promotion?" instead of the medical or corporate problem.
And could someone who steals a gown and wig from one of a very small number of legal tailors really hope to get away with it? Being identified as a thief would surely be a one-way ticket out of the profession.
And would someone yawning through a balaclava, covering his mouth with his gloved hand (which one?) and then opening a door (with which hand?), necessarily leave DNA on the knob? Would the cops necessarily test the knob for DNA as well as fingerprints? Hearing that the perpetrator wore gloves throughout, would they even try? Mightn't the perpetrator try to obliterate traces by rubbing with the glove?
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For those unfamiliar with the British legal system, I have a few suggestions for background:
Sarah Caudwell (http://en.wikipedia.org/wiki/Sarah_Caudwell) wrote four IMHO completely charming novels/mysteries about a group of four young barristers, starting with Thus Was Adonis Murdered. One of the common themes is their hatred and fear of their clerk, Henry, who is nominally their shared employee, but who is also their taskmaster, accepting assignments on their behalfs and doling them out. (When my wife and I were in Britain last year, we very much enjoyed our walking tour of the Inns of Court, and were thrilled to be in New Square, Lincoln's Inn, home to the chambers of Caudwell's barristers.)
In Rumpole of the Bailey, a book and tv series about a barrister of the criminal court (http://en.wikipedia.org/wiki/Rumpole_of_the_Bailey), old hand Rumpole persistently resists becoming a QC; a QC has certain prestige and privileges in court, and gets paid better than a junior, but also is somewhat limited--because of the higher fees, a QC is often less likely to be chosen to appear on behalf of clients who are less well-heeled. That's the other side of silk-ness.
In A Fish Called Wanda (http://www.imdb.com/title/tt0095159/reference) the barrister played by John Cleese is scandalized by the attempts of Jamie Lee Curtis to communicate with him directly on behalf of her fellow thief and his defendant, and tries repeatedly to run away. All communications are supposed to go through the defendant's solicitor.
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I wonder why so many of the 419 scam emails I get purport to come from a barrister purportedly trying to clear up an inheritance. Wills and such are the province of solicitors, not barristers.
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Here in Canada (outside of Quebec, with its different legal system), lawyers generally style themselves Barristers and Solicitors, although individuals within a firm may specialize in various aspects of the law. There are no such institutions such as Inns of Court or barrister's chambers.
And again here in Canada, QCs are the gift of governments, mostly provincial. Regardless of what Wikipedia says (http://en.wikipedia.org/wiki/Queen%27s_counsel#Canada), they used to be given out politically--usually the appointees were lawyers who were hacks of various sorts (politicians, bagmen, etc.) for the party currently in power. (It's much less of a deal here than in the UK--QCs have the prestige and the gowns and seniority, but there isn't such a big deal in fees and such.) When the social-democratic party gained power (for the first time ever) in the province of Ontario, it not only decided not to create any more QCs, but also abolished all the current ones. One Ontario QC was so outraged that he formally changed his name to include the "QC."
And I'm not sure about other provinces, but here in British Columbia, most prosecutions are represented by the barristers of the Crown Prosecution Services, but occasionally they may hire an outside counsel for a particular case--typically a high-profile one, or one where there might be a conflict of interest.