UK Stocks-Factors to watch on October 9
(Reuters) - ** Secure Trust Bank STBS.L slides 17.85% to 997.42p; top loser on London's small caps index .FTSC ** Co expects FY underlying profit before tax to fall to as low as 9 mln pounds ($12 mln) below market expectations ** Reports more-than-expected drop in vehicle loan portfolio; incurs higher-than-anticipated impairment charges YTD ** As of last close, STBS up 70.66% this year ($1 = 0.7489 pounds) (Reporting by Simone Lobo in Bengaluru) ((Simone.Lobo@thomsonreuters.com; +919920570373;))