A nuclear power station shut down in July has started generating power again.
Oldbury Power Station is to close permanently by 2008
One reactor is back online at Oldbury Power Station in South Gloucestershire, supplying power to the national grid.
When the power station closed it was revealed that it had only been open for eight days since last August.
Manager Pete Harper said: "Safety remains our number one priority. The staff have worked hard to ensure a safe and professional restart."
Oldbury has also completed the safety case for its other reactor, which remains offline.
The plant is due to stop generating electricity at the end of 2008.