By Karen Sloan (Reuters) – The former Prince Charles is not the only one getting used to having “King” in his title all of a sudden. About 1,900 elite UK lawyers and hundreds of others in Commonwealth countries who held the rank of “Queen’s Counsel” became “King’s Counsel” when Queen Elizabeth died last week, instantly assuming a title that had gathered dust since the queen took the throne in 1952. They must now use the shorthand KC rather than QC on letterhead and other materials, according to The Bar Council, which represents more than 1,650 barristers in England and Wales. Barristers are UK…