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Jeremy Corbyn will raise hopes that the Swansea Bay Tidal Lagoon project will be revitalised when he delivers his flagship conference speech with the promise of a “green jobs revolution” he claims would create more than 400,000 skilled jobs.

A spokesperson for Mr Corbyn confirmed that the proposal to build an electricity-generating lagoon in Swansea bay is “absolutely” part of Labour’s vision for the green economy.

Mr Corbyn will use the Conservative UK Government’s refusal to back the Swansea project as a key example in his attack on its environmental credentials.

He will say: “Despite their rhetoric the Tories may as well be climate change deniers.”

The Labour leader will say that “failing to back the Swansea Bay Tidal Lagoon project” was the “wrong decision for our economy, the wrong decision for jobs in Wales, the wrong decision for the future of our planet”.

Shadow Business Secretary Rebecca Long-Bailey underscored Labour’s continuing enthusiasm for the project, saying: “We were committed to a Swansea tidal lagoon and we haven’t changed our position... [We] still believe that we can lead the world in terms of tidal technology.”

An independent review led by former Conservative Energy Minister Charles Hendry backed the Swansea "pathfinder" project as a “no regrets” policy but in June the UK Government said the proposals for a series of lagoons did not meet the “requirements for value for money”.

Mr Corbyn will put green energy plans at the heart of his leader’s speech in Liverpool. He will set targets to reduce net carbon emissions by 60% by 2030 and zero by 2050.

The goal will be for 60% of the UK’s heat and electricity to come from low carbon or renewable sources by 2030.

He wants to see:

A sevenfold increase in offshore wind

A doubling of onshore wind

A trebling of solar

Mr Corbyn will pledge that the plans – which focus on offshore and onshore wind, solar energy and home energy efficiency – will bring “skills and security to communities held back for too long.”

He will say: “There is no bigger threat facing humanity than climate change. We must lead by example.

“Our energy plans would make Britain the only developed country outside Scandinavia to be on track to meet our climate change obligations. That means working with unions representing the workforce to ensure jobs and skills are protected as we move towards a low-carbon economy.

“And it means working with industry to change the way we build, and to train the workforce to retrofit homes and work in the industries we will build. It needs a government committed to investing in renewables, in jobs and in training.

“I can announce today that Labour will kickstart a green jobs revolution. Our programme of investment and transformation to achieve a 60% reduction in emissions by 2030 will create over 400,000 skilled jobs, based here and on union rates, bringing skills and security to communities held back for too long.”

'A radical plan to rebuild and transform Britain'

(Image: Liverpool EchoJames Maloney)

Mr Corbyn will also look back to the 2008 financial crisis, saying: “Ten years ago this month, the whole edifice of greed-is-good, deregulated financial capitalism, lauded for a generation as the only way to run a modern economy, came crashing to earth, with devastating consequences. But instead of making essential changes to a broken economic system, the political and corporate establishment strained every sinew to bail out and prop up the system that led to the crash in the first place.

“People in this country know - they showed that in June last year - that the old way of running things isn’t working any more. That’s why Labour is offering a radical plan to rebuild and transform Britain.”

(Image: Tidal Lagoon Power/PA Wire)

Labour wants to see the share of electricity coming from low carbon or renewable sources go up from 50% to 85%, claiming that its package of proposals would lead to an extra 410,000 “good jobs spread right across the UK”.

The party argues that changing planning guidance for onshore wind will encourage private investment.

As part of its bid to make “all homes energy efficient” – an ambition which would require working with devolved governments – it has set aside £12.8bn in its National Transformation Fund to cover an insulation programme in the first term of a new government.

It states in a briefing note: “Once the initial investment is made, Britain will have the comfort of energy security for decades to come, benefiting from the near-free supply of solar, wind and tidal energy, and protected from the ups and downs of fossil fuel prices.”