Hinkley Point in Somerset has been granted the country's first new site licence for a nuclear power station in 25 years.
The industry regulator, the Office for Nuclear Regulation, has awarded the licence to NNB GenCo, a subsidiary of French energy giant EDF.
The firm will still need other permissions before construction can go ahead.
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The whole region staying clear overnight with warm temperatures.
Temperatures remain high up to 12C inland.
Until now the ground has just been too waterlogged to let them out to graze.