In July 2010 BG Group signed a Share Sale Agreement with AES Ballylumford Holdings for the sale of Premier Power Limited, a wholly owned subsidiary of BG Group, for a total consideration of £99 million. Premier Power Limited operates the 1,246 MW power plant located at Ballylumford in Northern Ireland.

Ballylumford power station is the largest electricity generation site on the island of Ireland. The facility consists of three power stations with a gross capacity of 1 316 MW (1 246 MW effective): (i) a 600 MW Combined Cycle Gas Turbine (“CCGT”) unit completed in 2003 (“C” Station); (ii) a 600 MW nominal capacity (540 MW effective) conventional thermal plant (“B” Station); and, (iii) two Open Cycle Gas Turbine (“OCGT”) units providing an additional 116 MW nominal capacity (106 MW effective) for grid support and emergency response. The CCGT, one of the three thermal units and the OCGT units are contracted to NIE Energy Ltd under long term power purchase agreements, while the remaining “B” Station units sell their output merchant into the Single Electricity Market (“SEM”).