UK Stocks-Factors to watch on Dec 19

Dec 19 - Britain's FTSE 100 index is seen 11 points lower at 6,691 on Wednesday, according to financial bookmakers. * RBS: Royal Bank of Scotland has appointed Katie Murray as chief financial officer, the bank said on Tuesday, making permanent a role she has held on an interim basis since August. * INDIVIOR: Indivior Plc said on Tuesday it could launch a cheaper version of its blockbuster opioid addiction treatment, Suboxone, if rivals release generic versions of the drug. * GLE