Nuclear regulator permits restarting of reactor 4 at Hunterston B

EDF Energy is expected to restart reactor a year after it was shut down over safety concerns

Britain's nuclear watchdog has agreed to allow one of the country's oldest nuclear reactors to restart, one year after it was shut down to investigate cracks in its graphite core.

EDF Energy is expected to restart reactor 4 at its 40-year-old Hunterston B nuclear plant within weeks after the Office for Nuclear Regulation (ONR) said the plant was safe.