Carnival, Severn Trent weigh on FTSE By: MarketWatch June 06, 2011 at 04:21 AM EDT British stocks edge lower, with travel stocks under pressure after Goldman Sachs downgraded the sector and bank stocks also among the fallers. Read More >> Related Stocks: BP Plc ADR Barclays Plc ADR Carnival Corp Lloyds Banking Group Plc ADR