The chief executive of French energy giant EDF, Vincent de Rivaz, is to be quizzed by MPs over the delay in making a final investment decision on the multi-billion-pound Hinkley Point C nuclear power project in Somerset.
The Energy and Climate Change committee says it will explore issues including the cause and impact of the delay to a final investment decision, financial and operational risks for the planned power station, and alternative plans for the UK's energy future.
Mr de Rivaz told the committee in March that Hinkley Point would definitely go ahead - with the final investment decision expected in early May. But the French economy minister later said the green light may not be given until September.
Dr Doug Parr, from environmental campaign group says it is no surprise that EDF won't be pinned down.
He adds that the Government should 'wise up' to the "repeated empty promises that Hinkley will deliver power on time and on budget when all the evidence points to the contrary."