Hong Kong's richest businessman Li Ka-Shing plans to bid for the UK arm of French electricity giant EDF Group.
Mr Li's bid would be a joint venture between holding company Cheung Kong Infrastructure (CKI) and Hongkong Electric, which is 40% owned by CKI.
Last October EDF said it wanted to "evaluate ownership options" for its UK electricity distribution business.
EDF Group is seeking to raise at least 5bn euros (£4.5bn; $6.8bn) to reduce its debt levels.
There are thought to be three other potential buyers for EDF's UK electricity distribution business.