The electric vehicle-leasing business which forms part of the same group as Britain’s biggest household energy supplier will on Friday announce a £500m extension to its financing war chest.

Sky News has learnt that Octopus Electric Vehicles (Octopus EV) has struck a deal with lenders including Lloyds Banking Group, Morgan Stanley, and Credit Agricole to take its total funding line to £2bn.

The additional financing paves the way for the expansion of the company’s UK fleet from 40,000 to 75,000 cars, and is an extension to a facility agreed with Lloyds in 2023.

Sources said a public announcement would be made at the COP30 climate summit in Brazil.

Last month, EVs accounted for 26% of all new cars in the UK, a record figure, while across Europe, more than 1.7 million EVs were registered in September – a 19% jump from the same month last year.

Octopus EV offers an all-in-one package comprising a leased car, bespoke EV tariffs, home chargers and access to Electroverse, which it describes as Europe’s largest public charging network.

“Electric momentum is surging across the UK and Europe,” said Gurjeet Grewal, CEO of Octopus EV.

“Every month, thousands more drivers are discovering just how affordable and enjoyable making the switch can be – and this fresh funding from Lloyds, Morgan Stanley and Crédit Agricole will allow us to bring even more zero-emission cars onto UK roads.”

Keir Mather, Minister for Aviation, Maritime and Decarbonisation, said the government had “helped over 30,000 people go electric thanks to our electric car grant since we launched it this summer, saving them cash with discounts of up to £3,750 on new EVs”.

“We’re backing people and industry to make the switch with £4.5bn investment, and it’s great to see industry players like Octopus backing the EV revolution and getting more electric cars out on our roads,” Mr Mather added.

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The minister’s comments come, however, amid speculation about a pay-per-mile levy on electric car drivers in Rachel Reeves’s budget later this month.

Octopus’s EV arm also specialises in salary sacrifice schemes, which the chancellor is also reportedly planning to target by reducing or removing tax incentives.

An influential coalition of leaders from Britain’s professional services sector has warned Rachel Reeves that a Budget tax raid on the sector would “stunt growth” in the UK’s faltering economy.

Sky News has obtained a letter sent to the chancellor on Thursday, which was signed by leading figures including the president of The Law Society, the chief executive of the Institute of Chartered Accountants in England and Wales, and the bosses of other leading trade bodies including TheCityUK and the BVCA.

In it, they warn that reported plans to impose employers’ national insurance on limited liability partnerships (LLPs) would damage Britain.

“Such a move would strike at the heart of a sector that is not only growing but actively partnering with government to deliver economic growth,” they wrote.

“Our professional services sector sits among the UK’s global success stories – driving investment, creating jobs, and reinforcing the UK’s reputation as an attractive place to do business.

“Introducing higher taxes on LLPs now would be a misstep and will stunt growth.

“It would undermine the government’s stated ambition to support professional services as a growth partner and send a damaging signal to international investors.

“At a time when firms are already facing potential major regulatory changes – from anti-money laundering compliance to evolving tax adviser rules – this additional burden risks creating a perfect storm that stifles investment, hiring, and innovation.”

The letter warned that the mooted tax changes would force firms to reconsider their corporate structures, “triggering instability and uncertainty across our economy”.

“Meanwhile, our global competitors – many of whom are actively courting professional services firms – would seize the opportunity to attract talent and capital away from the UK,” it added.

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The letter was also signed by the City of London Law Society and The City of London Corporation.

It has been sent to the chancellor less than two weeks before she delivers her Budget, and adds to the multitude of warnings from across the economy about the levers she intends to pull to plug an estimated £30bn fiscal black hole.

Last week, the Financial Times reported that a potential tax raid on LLPs was likely to be less severe than feared following warnings from senior sector figures.

The Treasury has declined to comment on the prospective move.

The UK’s economic slowdown gathered further momentum during the third quarter of the year with growth of just 0.1%, according to an early official estimate that makes horrific reading for the chancellor.

The Office for National Statistics (ONS) reported a surprise contraction for economic output during September of -0.1% – with some of the downwards pressure being applied by the cyber attack disruption to production at Jaguar Land Rover.

The figures for July-September followed on the back of a 0.3% growth performance over the previous three months and the 0.7% expansion achieved between January and March.

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The encouraging start to 2025 was soon followed by the worst of Donald Trump’s trade war salvoes and the implementation of budget measures that placed employers on the hook for £25bn of extra taxes.

Economists have blamed those factors since for pushing up inflation and harming investment and employment.

ONS director of economic statistics, Liz McKeown, said: “Growth slowed further in the third quarter of the year with both services and construction weaker than in the previous period. There was also a further contraction in production.

“Across the quarter as a whole manufacturing drove the weakness in production. There was a particularly marked fall in car production in September, reflecting the impact of a cyber incident, as well as a decline in the often-erratic pharmaceutical industry.

“Services were the main contributor to growth in the latest quarter, with business rental and leasing, live events and retail performing well, partially offset by falls in R&D [research and development] and hair and beauty salons.”

The weaker than expected figures will add fuel to expectations that the Bank of England can cut interest rates at its December meeting after November’s hold.

The vast majority of financial market participants now expect a reduction to 3.75% from 4% on 18 December.

Data earlier this week showed the UK’s unemployment rate at 5% – up from 4.1% when Labour came to power with a number one priority of growing the economy.

Since then, the government’s handling of the economy has centred on its stewardship of the public finances.

The chancellor was accused by business groups of harming private sector investment and employment through hikes to minimum wage levels and employer national insurance contributions.

The Bank has backed the assertion that hiring and staff retention has been hit as a result of those extra costs.

There is also evidence that rising employment costs have been passed on to consumers and contributed to the UK’s stubbornly high rate of inflation – a figure that is now expected to ease considerably in the coming months.

Rachel Reeves has blamed other factors – such as Brexit and the US trade war – for weighing on the economy and leaving her facing a similar black hole to the one she says she inherited from the Conservatives.

Her second budget is due on 26 November.

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She said of the latest economic data: “We had the fastest-growing economy in the G7 in the first half of the year, but there’s more to do to build an economy that works for working people.

“At my budget later this month, I will take the fair decisions to build a strong economy that helps us to continue to cut waiting lists, cut the national debt and cut the cost of living.”

Shadow chancellor Sir Mel Stride responded: “Today’s ONS figures show the economy shrank in the latest month, under a Prime Minister and Chancellor who are in office but not in power.”