General Electric and a US partner plan to invest £2bn in power generation and underground gas storage in the UK.
Through a project company, Canatxx Energy Ventures, the two aim to build two 2,000MW gas-fired power stations on the Isle of Angelsey off the coast of north Wales and at Thornton in Lancashire. They also intend to construct a massive gas storage facility in salt caverns near the Thornton site.
A Canatxx spokesman said it would submit a Section 36 planning application for an initial 800MW of generating capacity at Anglesey before the end of the month.
The plant would be a modular design using combined-cycle gas turbine units of 400MW. The remaining 1,200MW would be the subject of a separate planning application at a later stage. Total cost would be about £700m.
He said the Section 36 application for Thornton would be for the full 2,000MW and should be lodged in about three months. The size of the storage project has yet to be determined, but it was intended to supply other CCGT plants as well as the Canatxx unit. The combined cost of the two Lancashire projects would be £1.3bn.