UK Stocks-Factors to watch on August 26

(Adds futures) LONDON, Aug 26 (Reuters) - Britain's FTSE 100 index is seen opening down by 103 points or 1.7 percent on Wednesday, according to spreadbetters at London Capital Group. Futures were down 1.1 percent ahead of the cash market open. For more on the factors affecting European stocks, please click on * The UK blue-chip index posted its biggest one-day rise since 2011 on Tuesday after China cut interest rates to calm markets, following turbulence that has rocked equitie