Sir Keir said the plans would improve the country’s energy security by increasing the supply of clean, homegrown power.
He added that Britain had been “held hostage” by Russian President Vladimir Putin for “too long”, which has resulted in energy prices “skyrocketing at his whims”.
The process of choosing to loosen rules on where nuclear reactors could be built began under Rishi Sunak’s Conservative government with a consultation in January 2024.
Ministers said Britain is considered one of the world’s most expensive countries in which to build nuclear power, and a new Nuclear Regulatory Taskforce will be established to speed up the approval of new reactor designs and stream line how developers engage with regulators.
Conservative shadow energy secretary Andrew Bowie said it was “about time” Labour followed his party’s lead in recognising the benefits “of stable, reliable, baseload nuclear power”.
But Doug Parr, policy director of Greenpeace UK, claimed the government had not applied “so much as a pinch of critical scrutiny or asking for a sprinkling of evidence”.
“The Labour government has swallowed [the] nuclear industry spin whole,” he said, adding: “They present as fact things which are merely optimistic conjecture on small nuclear reactor cost, speed of delivery and safety.”
While the overall cost of nuclear power is comparable with other forms of energy, nuclear plants are extremely expensive to build.
The head of the Nuclear Industry Association, Tom Greatrex, said the changes would give investors certainty and enable them to get on with building new plants.
Gary Smith, GMB’s general secretary, said the union has repeatedly said “there can be no net zero without new nuclear”.
The previous Conservative government gave the go-ahead for a new nuclear reactor on the Suffolk coast – Sizewell C – in 2022.
The new Labour government committed a further £2.7bn to the project in October but a final decision on its future is not due to come until the spending review later this year.
Two new nuclear reactors are also being built at Hinkley Point C in Somerset, which are due to open in 2030.