Barclays, Unilever, Diageo gain in higher London By: MarketWatch May 07, 2009 at 04:55 AM EDT London shares trade higher on Thursday, helped by updates from Barclays, Unilever, Diageo and several insurers. Read More >> Related Stocks: Barclays Plc ADR Diageo Plc ADR Lloyds Banking Group Plc ADR Unilever NV