U.K. index dips; miners offset gains from banks By: MarketWatch August 20, 2012 at 04:57 AM EDT U.K. stocks are mostly flat on Monday, with gains from major banks offset by mining stocks weighing on the index. Read More >> Related Stocks: BP Plc ADR Barclays Plc ADR HSBC Holdings Plc ADR Rio Tinto Plc ADR Royal Bank Scotland Group Plc Royal Dutch Shell Cl B ADR