Resource firms boost FTSE 100, GSK rises By: MarketWatch January 29, 2013 at 05:00 AM EST Resource firms lead U.K. stocks higher on Tuesday, tracking gains for most commodity prices, while GlaxoSmithKline PLC advances after a broker upgrade. Read More >> Related Stocks: BP Plc ADR Barclays Plc ADR Gsk Plc ADR Rio Tinto Plc ADR Royal Bank Scotland Group Plc Royal Dutch Shell Cl B ADR