Energy bills will fall within five years thanks to a green energy blitz, Keir Starner has pledged.

The Prime Minister said he “stands by” his commitment that he will bring down bills by £300 a year by 2030. He criticised the “inaction of the last ten years” which he said has cost every family and every business as he vowed “to move at pace to get those bills down” with his new state-owned firm Great British Energy.

In a speech at a turbine factory just outside Widnes, Cheshire, the PM set out an “historic announcement” for the country to build offshore wind farms on the Crown Estate. He set out a partnership with the monarchy, which owns the vast majority of the country’s seabed, to help speed up the building of offshore wind farms.

Asked if people will see their bills fall down over this Parliament, which ends in 2029, Mr Starmer said: “We certainly want to get those bills down.” And on Labour ’s pledge to bring bills down by £300 a year, he added: “I stand by everything in our manifesto.

“One of the things I made clear in the election campaign is that I wouldn’t make a single promise or commitment that I didn’t think we could deliver in Government. That’s why we carefully costed and funded everything in our manifesto.

“That does depend on early, firm decisions being made, which is why we set up GB Energy, why we’ve announced the partnership today with the Crown Estate and why the Energy Secretary has already taken action in week one in relation to onshore wind and in relation to solar energy, and also pushing on with nuclear.”

Mr Starmer promised to end reliance on “foreign dictators” for energy after Vladimir Putin's invasion of Ukraine sent bills spiralling. “We have the capability, we’ve got the skills, we have the workforce, we’ve got the talent. Let’s own more and more in Britain,” he added.

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The Prime Minister warned MPs from all parties, including Labour, that he will not accept resistance to clean energy projects. At PMQs on Wednesday, he slapped down Green MP Adrian Ramsay for pushing back on a pylon route which will carry power from offshore wind farms in his constituency.

“We will take the tough decisions because it’s the failure of tough decisions and the running away from tough decisions that has caused over a decade of opportunity,” Mr Starmer said. “That will include tough decisions on the planning, where we intend to make the necessary changes and that will apply everywhere, whatever the rosette on the constituency.”

But the PM promised the public he would not force them to take action such as switching from a gas boiler to an alternative heating system. Mr Starmer said he was “not going to tell people what to do”, adding: “This is not about imposing a disproportionate burden on them.”

In the deal to use the King’s property, enough wind turbines to power two thirds of UK homes will be built on seabeds. The Crown Estate estimates that it will add another 20 to 30 gigawatts of generating capacity by 2030, which would be enough power for the equivalent of almost 20 million homes.

The Estate has a £16billion portfolio of land and seabed, and returns its profits to the Government, a small portion of which goes to the monarchy. Much of its £1.1billion profit last year came from offshore wind projects, and it is already engaged in a significant push to find and develop new plots of the seabed for companies to build wind turbines on.