Energy group Centrica has paid more than £300 million to secure its own gas storage facility.

The British Gas group, which supplies 65 per cent of the UK residential market, has bought Dynegy Storage and Dynegy Onshore Processing UK from struggling US energy firm Dynegy.

The two businesses operate the Rough offshore gas storage facility in the North Sea and the associated pipeline, the onshore processing site in North Yorkshire and an office in Surrey. The Rough asset is the largest storage facility in the UK, with a capacity of around 100 billion cubic feet.