The National Grid has asked Ofgem recover the costs of two contracts for grid services that it agreed with SSE and Drax following a tender process. The contracts are worth £113 million in total.
The SSE deal is in relation to the Fiddlers Ferry power station.
An Ofgem spokesperson said: “Ofgem set National Grid a cost target for these services. National Grid has spent significantly more money than the agreed target. National Grid has applied to Ofgem to recover all of these costs from generators and suppliers through the ‘Income Adjusting Events’ process.
“When making a decision on this Ofgem has powers to disallow some or all of the expenditure on these contracts if it judges that the case for recovering the money has not been met.”