GALWAY, IRELAND--(Marketwire - August 20, 2009) - Researched by Industrial Info Resources (Sugar Land, Texas) -- ScottishPower (Glasgow, Scotland) has signed up Shell UK (London, England), a subsidiary of Royal Dutch Shell plc (NYSE:RDS.A) (The Hague, Netherlands) and National Grid plc (NYSE:NGG) (London) to accelerate plans to create the first commercial-size