Reeves insists Labor’s economic plan is “not on the same track” as the Tories’

Ms Reeves said she was “confident” that Labor will deliver on its promise to spend £28 billion a year on green initiatives in the first term of the UK government formation.

The party has angered its most climate-conscious supporters by watering down a pledge to borrow the sum it plans to invest to tackle the environmental crisis.

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Ms Reeves argued that the financial situation had deteriorated since the signing after Liz Truss’ disastrous mini-budget.

A standard speech by Labor leader Sir Keir Starmer this week was interrupted by protesters who accused him of a policy volte-face.

But Ms Reeves stressed she expects them to increase Green spending to £28bn by the end of a first general election if Labor wins the next general election.

She told BBC show Sunday With Laura Kuenssberg: “We’re confident we can get there.

“We are obliged to do this, but it is subject to our budgetary rules.

“All of our plans will be built on a foundation of economic and fiscal responsibility. Labor will not play around with public finances easily.”

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Ms Reeves outlined her green succession plan in 2021, to spend billions to invest more in projects like wind power and carbon capture immediately after a Labor Party victory.

But she now argues that her fiscal rules – that the debt as a proportion of national income must come down after five years – are “non-negotiable”.

The SNP has criticized Labor for perceived watering down of climate finance and claimed the party cannot be trusted to deliver on its commitments.

SNP Westminster leader Stephen Flynn told Sky’s Sunday with Sophy Ridge that Labor “changed their minds almost daily when it comes to some of these big issues”.

He added: “I think the only thing that is very clear to Scottish voters is that there is one party that is offering change and one party that is giving real hope and that is the SNP.”

Read more: Scotland will be Britain’s ‘beating heart’ as part of Labor’s clean energy plan

Ms Reeves tried to portray Labor as the “only choice” for home ownership after she accused the Tories of “breaking up” the housing market.

But as she also tried to portray herself as financially responsible, she insisted that building houses didn’t require government subsidies.

“This is not about spending tax money, but about releasing the planning system,” she said to Ms. Kuenssberg.

Ms Reeves denied a Sunday Times report that her tax and spending policies would follow those of the Conservatives until growth returns.

“They are not on the same path,” she told the BBC. “But I am absolutely committed to budgetary discipline.”

Labor has topped the polls as the Tories struggle after 13 years of rule whose popularity was eroded by the Boris Johnson Partygate scandal.

But Ms Reeves, a former chess champion, used a chessboard analogy to warn against the complacency that assumes Labor will win next year’s expected general election.

“We have a rook lead after about 30 moves, but we’re playing against an opponent who usually beats us. So that’s not in the bag,” she said.