Rachel Reeves begs big banks to back Budget amid tax rumours: 'There's brilliant stuff in there!'

In return, the Chancellor is believed to be planning to shield banks from potential tax rises despite ongoing pressure from backbench Labour MPs to do.

Said support would involve lenders demonstrating how Government policies will increase their support for first-time property purchasers and small enterprises.

Sources indicate to The Financial Times that there is an expectation that financial institutions will avoid voicing opposition to Government measures.

While Treasury representatives maintain no formal agreement exists with the banking sector, they anticipate City leaders will publicly commit to maintaining their planned investments.

Banks and financial services firms had cautioned the Treasury that increased taxation would lead to reduced lending capacity, following extensive lobbying over recent months to prevent additional charges.

These efforts have apparently succeeded, according to those with knowledge of Budget preparations.

A senior City executive acknowledged that Ms Reeves had requested financial services leaders maintain a positive outlook on the British economy.

"There was a frustration that the Government's positive messaging about the economy was being undermined by unwelcome commentary," they stated.

Speaking to The Financial Times, a Treasury representative confirmed that [Ms Reeves] does want business to highlight the positives more."

Previous reports indicated the Chancellor had warned business leaders that negative commentary could strengthen Nigel Farage's Reform ahead of future elections.

The Chancellor seeks what one source described as a "continuous drumbeat of commitments and deliverables" to demonstrate the advantages of avoiding specific tax rises in the Budget.

This approach aims to counter demands from Labour's left wing for increased banking levies, particularly as bank profits have grown and share values have reached peaks not seen since the financial crisis.

Progressive Labour MPs have advocated for an "exit charge" targeting capital gains of individuals relocating overseas, alongside higher taxes on limited partnerships.

Ms Reeves' advisers have communicated to banks that any retreat on taxation would prove ineffective if the public fails to grasp the resulting economic advantages.

During a private Westminster gathering on Monday evening,Ms Reeves rallied Labour MPs behind her Budget whilst addressing concerns about her leadership.

"I will show the media, I will show the Tories, I will not let them beat me," she declared, pledging to remain in post for years ahead despite poor approval ratings.

The Chancellor expressed anger about destabilising Budget leaks in recent weeks but promised MPs the package contained surprises they would appreciate. "There's brilliant stuff in there," she assured them.

In response to media and public criticism of her performance at the Treasury, Ms Reeves said she had not "recognised the misogyny that still exists in public life".