UK Stocks-Factors to watch on Nov 23

Nov 23 (Reuters) - Britain's FTSE 100 index is seen opening down 17 points at 7,401.9 on Thursday, according to financial bookmakers. * RBS: Britain will reprivatise bailed-out lender Royal Bank of Scotland by selling 15 billion pounds ($20 billion) of shares, according to budget documents released on Wednesday, in a boost to finance minister Philip Hammond's coffers. * CMC MARKETS: CMC Markets chairman Simon Waugh is to step down two years after its London flotation, Sky N