Labour MPs are among a group of more than 60 parliamentarians to have made public their opposition to the planned Rosebank oil field – with one of Sir Keir Starmer’s backbenchers urging the Government to rule against the development and take a stand “against Trump, Reform and their fossil fuel paymasters”.

Clive Lewis is one of more than 50 MPs at Westminster who have signed a pledge from campaign group Uplift to “oppose the Rosebank oil field” and instead “advocate for a properly funded just transition for oil and gas workers and communities”.

Urging the Government to reject the development, Norwich South MP Mr Lewis said: “We must stand our ground against Trump, Reform and their fossil fuel paymasters.

“Approving an enormous new oil field would mean caving in to their anti-climate, anti-renewables agenda that runs completely counter to our values and our long-term interests.”

Scottish Labour MP Chris Murray, another of the Labour MPs to have signed the pledge, said the decision on Rosebank was “an opportunity for the Government to change course”.

It comes as the UK Government continues to consider whether the development of the oil field can go ahead – with Labour now under mounting pressure after the loss of the Gorton and Denton by-election to the Greens on Thursday.

Rosebank, which lies about 80 miles west of Shetland, is the UK’s largest untapped field, containing up to an estimated 300 million barrels of oil.

Drilling there was approved by the Conservative government in 2023 but was then subject to a legal challenge in the wake of a Supreme Court ruling which said the emissions created from burning fossil fuels should be considered when granting permission for new sites.

Now the decision on whether it can proceed lies with Labour ministers – with some 16 Labour MPs having made plain their opposition to the development.

The group includes Mr Lewis, Mr Murray, former Labour shadow chancellor John McDonnell and Scottish Labour’s Brian Leishman.

Former Labour MPs Jeremy Corbyn and Diane Abbott have also signed the pledge, along with a number of Liberal Democrat and Green MPs, SNP MP Chris Law, Plaid Cymru’s Liz Saville Roberts and Paul Maskey of Sinn Fein.

In Scotland a number of Labour MSPs have signed the pledge, along with Green MSPs – including the party’s Scottish co-leader Ross Greer – and former SNP health secretary Michael Matheson.

While previous Scottish first ministers Nicola Sturgeon and Humza Yousaf made plain their opposition to Rosebank, First Minister John Swinney has insisted the Scottish Government takes a “case-by-case approach” to new oil and gas developments, stressing these should only proceed if found to be compatible with climate change targets.

Mr Lewis said opposing Rosebank would “show that a Labour Government will stand by the promises we made to the country”.

He added: “There are only so many times we can afford to make mistakes and then change course.

“With Rosebank, we have an opportunity to get it right the first time.”

Mr Murray, the Labour MP for Edinburgh East and Musselburgh, said many locals in his constituency were “deeply concerned about Rosebank and rightly so”.

He added: “Climate change is one of the reasons I came into politics, and opening new oil and gas fields is simply incompatible with our climate commitments.

“With the North Sea’s oil supply dwindling, Scotland’s energy sector must transition to clean energy, or workers risk being left behind.”

Scottish Labour MSP Mercedes Villalba, who has also signed the pledge, argued that “approving projects like Rosebank will lock us into a toxic dependence on volatile, conflict-ridden fossil fuels”.

This would create “another excuse to delay the urgent investment needed to create secure, well-paid jobs for Scotland’s workers”, she added.

Ms Villalba said: “In an increasingly uncertain world, where climate action is relegated in favour of fossil politics, the UK and Scotland must lead the way on the clean energy transition.”

Wera Hobhouse, Liberal Democrat MP for Bath, said people in her constituency and across the country “are already facing the consequences of an increasingly unstable climate”.

Highlighting the impact of flooding and “skyrocketing food prices”, she said that “climate impacts are now a daily reality”.

Ms Hobhouse said: “Extreme weather is damaging crops, putting pressure on farmers, and destroying our precious natural environment.

“We cannot ignore these warning signs.

“A massive new oil field like Rosebank would only make matters worse.

“The emissions would be enormous, locking us into decades more pollution when we should be cutting carbon and unlocking the benefits of cheap, renewable energy.”

Approving the Rosebank development would “make a mockery of Labour’s environmental promises”, she said.

A UK Government spokesperson said: “Our priority is to deliver a fair, orderly and prosperous transition in the North Sea in line with our climate and legal obligations, which drives our clean energy future of energy security, lower bills, and good long-term jobs.”