U.K. index up as investors await ECB By: MarketWatch August 02, 2012 at 07:29 AM EDT London’s FTSE 100 Index adds to gains on Thursday as investors anticipate policy announcements from the European Central Bank later in the day. Read More >> Related Stocks: BP Plc ADR Rio Tinto Plc ADR Royal Bank Scotland Group Plc Royal Dutch Shell Plc ADR