EDFof France is to sell its UK electricity networks business to Cheung Kong Infrastructure (CKI) of Hong Kong for £5.8 billion.
EDF's UK unit, EDF Energy Networks, distributes electricity to 7.8 million customers and generates around a fifth of Britain's electricity.
In acquiring EDF Networks, CKI has obtained low-voltage electricity distribution networks in the east and south of England, and ongoing contracts with businesses including the London Underground, Heathrow and Gatwick airports, and the Channel Tunnel.