National Grid has extended the contract it struck with EDF to reduce output from the Sizewell B nuclear station in a bid to keep the system stable over summer.
The electricity system operator is having to work harder to balance the power system due to exceptionally low demand as a result of coronavirus.
It agreed the contract with EDF last month and has now extended the deal until August.
National Grid said the contract will be worth between £34m and £46m to EDF, depending on market power prices.
The ESO has also created a new turndown service, which pays embedded generators to curtail output, and clarified powers to instruct distribution networks to disconnect generators as a last resort.
See Sizewell details here.