UK Stocks-Factors to watch on Jan 16

Jan 16 (Reuters) - Britain's FTSE 100 index is seen opening up 8 points on Tuesday, according to financial bookmakers. * RIO TINTO: Global miner Rio Tinto said on Tuesday it could ship up to an additional 10 million tonnes of iron ore in 2018 worth $780 million at today's prices after reporting a 1 percent rise in 2017 shipments. * CITIGROUP: Citigroup Inc will increase compensation for women and minorities to bridge pay gaps in the United States, the United Kingdom and Germa