The Sizewell B nuclear power station which was shut down because of a fault has now partially returned to service.
The reactor and Turbine 2 at the power station in Suffolk was reconnected to the national grid at 4.30am this morning (Tuesday March 13).
This means that Sizewell B is currently working at half capacity, generating enough electricity for about one million homes.
The reactor automatically shut down at 8.15pm on Friday March 2 following an electrical fault.
Turbine 1 remains offline although work is continuing to bring it back online shortly.
Sizewell B station director, Jim Crawford, said they had worked "systematically to repair the electrical fault before bringing the reactor back on line in a safe, managed way".
He added they were now working to get Turbine 1 back up, returning the station to generating at full capacity.
No timescale is being given for Turbine 1’s return to service. A further update will be issued once this occurs.