Plans to build the first new UK nuclear plant in 20 years have suffered an unexpected delay after the government postponed a final decision until the early autumn.
French firm EDF, which is financing most of the £18bn Hinkley Point project in Somerset, approved the funding at a board meeting.
Contracts were to be signed on Friday.
But Business Secretary Greg Clark has said the government will “consider carefully” before backing it.
According to reports, EDF’s chief executive Vincent de Rivaz has cancelled a trip to the UK on Friday following Mr Clark’s comments.
Critics of the plan have warned of environmental damage and potential escalating costs.
They are also concerned that the plant is being built by foreign governments. One third of the £18bn cost is being provided by Chinese investors.
EDF still hopes to have more than 2,500 workers on site by next year.
