U.K. stocks drop to six-week low; banks fall By: MarketWatch October 07, 2013 at 09:34 AM EDT The U.K.’s benchmark stock index heads for its lowest closing level in more than six weeks on nervousness about the prolonged U.S. government shutdown. Read More >> Related Stocks: BP Plc ADR Bhp Billiton Ltd ADR HSBC Holdings Plc ADR Lloyds Banking Group Plc ADR Rio Tinto Plc ADR Royal Bank Scotland Group Plc Royal Dutch Shell Cl B ADR