The Labour Party has outlined plans to invest £250bn in upgrading double glazing, loft insulation and green technologies in millions of UK households.


The measures would aim to reduce carbon emissions and household bills.


Almost all of the UK's 27 million homes would benefit from the project, called "Warm Homes for All", which would be completed by 2030.


Labour leader Jeremy Corbyn said the plans were part of a "green industrial revolution" that would generate 450,000 new jobs across the economy, while cutting carbon emissions by 10%.


Corbyn said: “If we don’t radically change course we face the threat of a hostile and dying planet”.


Of the total investment sum, only £60bn would come from central government, according to the Labour Party. The remainder would be accounted for with savings to energy bills.


The party says the project would cut energy bills for low income households by £417 annually.


Lower income households would be offered grants to upgrade their properties, with savings on their bills partially covering the cost of work on their properties.


Better-off households would be offered zero-interest loans to add energy saving technology to their homes.


But the Conservative Party cast doubt on Labour's proposals, saying bills would actually go up under the plans.


A spokesman for the incumbent party said: “Tackling climate change is vital but independent experts and even Labour’s own unions say their promises don’t stack up. The reality is that Jeremy Corbyn’s plans would wreck the economy, putting up bills for hardworking families – and preventing any real progress on climate change”.