UPDATE 1-UK Stocks-Factors to watch on Feb 11
LONDON Feb 11 (Reuters) - Britain's FTSE 100 index is seen opening higher on Tuesday, with futures gaining 0.4 percent by 0731 GMT ahead of the cash market open.
* The UK blue-chip index closed up 19.87 points, or 0.3 percent, at 6,591.55 points on Monday, rising for a fourth straight session.
* The first testimony to Congress by Janet Yellen, the new chair of the U.S. Federal Reserve, will dominate the market's attention on Tuesday, with investors keen to hear what she will say about the pace of tapering of equity-friendly asset purchases following mixed U.S. jobs data in the past months.
* British retail sales rebounded last month after a weak December to record their strongest annual growth since April 2011, helped in part by a recovery in the country's property market, a monthly industry survey showed.