CORRECTED-UK Stocks-Factors to watch on Oct.17

(Corrects first paragraph to say '10 points' instead of '10 percent') Oct 17 (Reuters) - Britain's FTSE 100 index is seen opening up 10 points at 7,536.9 points on Tuesday, according to financial bookmakers. * CAPITA: Capita staff represented by British trade union Unite will go on strike after talks with the company over changes to its defined benefit pension scheme failed, the union said on Monday. * RIO TINTO: Global miner Rio Tinto on Tuesday said it had lifted its third