The British nuclear stations are now expected to remain operational until at least 2023, generating enough power for nearly two million homes in the country.
Commenting on this announcement, Energy Minister John Hayes said, "This decision will also secure hundreds of skilled jobs in both Somerset and North Ayrshire, highlighting the value of nuclear energy to our economy and society."
The British supplier noted that life extensions for these two power plants mean secure energy for the UK and benefit for over 1500 employees and contractors at these stations.
EDF Energy CEO Vincent de Rivaz made the announcement and also re-opened the Visitor Centre for Hinkley Point B in the town of Bridgwater.
"This decision will provide low carbon energy to keep the lights on in the UK and it will safeguard jobs at the plants, in the UK nuclear industry and its supply chain. It follows a thorough review of safety over the lifetime of each of the plants," said Rivaz.
"We continue to invest £300 million each year on capital expenditure in the nuclear fleet, and we spend an additional £350 million on plant operations with 90 per cent of the total being spent in the UK."
The latest announcement follows the five year extensions to the UK’s Heysham 1 and Hartlepool power stations announced in 2010.