Unite union national officer Kevin Coyne said: "At last the Government has provided the stability and certainty the UK needs to begin to meet the huge energy challenge facing us.
"Nuclear power is a key part of a balanced, low-carbon energy policy.
"The go-ahead at Hinkley Point will deliver thousands of skilled jobs in construction, manufacturing and the operation of the power station.
"The deal will hopefully pave the way for more power stations which will in turn generate more skilled jobs."
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Government minister Justine Greening has apparently opened up about her sexuality, as thousands took part in the London Pride parade.
Record crowds are at this year's Pride in London parade as people show their support for the LGBT community after the Orlando shooting
After a showery start to the day, parts of Northern Ireland, western Scotland and south-west England will see drier conditions.