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Big Carl has lifted the 245-tonne domed roof onto the first reactor building.
At 47 metres in diameter, it’s wider than St. Paul’s Cathedral’s dome.
It takes Britain a big step towards Net Zero and stronger energy security.
Teams waited for the perfect wind conditions to lower the dome into place.
The steel dome is made up of 900 welds.
The dome closes the first reactor building – so the reactor can be installed in 2024.
Dome lift footage
Drone shots from Dome lift