President Trump says he is firing a governor of the US central bank, a move seen as intensifying his bid for control over the setting of interest rates.

He posted a letter on his Truth Social platform on Monday night declaring that Lisa Cook – the first black woman to be appointed a Federal Reserve governor – was to be removed from her post on alleged mortgage fraud grounds.

She has responded, insisting he has no authority over her job and vowed to continue in the role, threatening a legal battle that could potentially go all the way to the Supreme Court.

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The president‘s threat is significant as he has consistently demanded that the central bank cut interest rates to help boost the US economy. Growth has sagged since he returned to office on the back of US trade war gloom and hiring has slowed sharply in more recent months.

Mr Trump has previously directed his ire over rates at Jay Powell, the chair of the Federal Reserve, blaming him for the economic jitters and has repeatedly called for him to be fired.

The Fed, as it is known, has long been considered an institution independent from politics and question marks over that independence has previously shaken financial markets.

The dollar was hit overnight while US futures indicate a negative opening for stock markets.

Mr Powell’s term is due to end next spring and the president is expected to soon nominate his replacement.

The Fed has 12 people with a right to vote on monetary policy, which includes the setting of interest rates and some regulatory powers.

Those 12 include the seven members of the Board of Governors, of which Ms Cook is one.

Replacing her would give Trump appointees a 4-3 majority on the board.

He has previously said he would only appoint Fed officials who support lower borrowing costs.

Ms Cook was appointed to the Fed’s board by then-president Joe Biden in 2022 and is the first black woman to serve as a governor.

Her nomination was opposed by most Senate Republicans at the time and was only approved, on a 50-50 vote, with the tie broken by then-vice president Kamala Harris.

It was alleged last week by a Trump appointed regulator that Ms Cook had claimed two primary residences in 2021 to get better mortgage terms.

Mortgage rates are often higher on second homes or those purchased to rent.

She responded to the president’s letter: “President Trump purported to fire me ‘for cause’ when no cause exists under the law, and he has no authority to do so,” she said in an emailed statement.

“I will not resign.”

Legal experts said it was for the White House to argue its case.

But Lev Menand, a law professor at Columbia law school, said of the situation: “This is a procedurally invalid removal under the statute.

“This is not someone convicted of a crime. This is not someone who is not carrying out their duties.”

The Fed was yet to comment.

It has held off from interest rate cuts this year, largely over fears that the president’s trade war will result in a surge of inflation due to higher import duties being passed on in the world’s largest economy.

However, Mr Powell hinted last week that a cut could now be justified due to risks of rising unemployment.

The owners of New Look, the high street fashion retailer, have picked bankers to oversee a strategic review which is expected to see the company change hands next year.

Sky News has learnt that Rothschild has been appointed in recent days to advise New Look and its shareholders on a potential exit.

The investment bank’s appointment follows a number of unsolicited approaches for the business from unidentified suitors.

New Look, which trades from almost 340 stores and employs about 10,000 people across the UK, is the country’s second-largest womenswear retailer in the 18-to-44 year-old age group.

It has been owned by its current shareholders – Alcentra and Brait – since October 2020.

In April, Sky News reported that the investors were injecting £30m of fresh equity into the business to aid its digital transformation.

Last year, the chain reported sales of £769m, with an improvement in gross margins and a statutory loss before tax of £21.7m – down from £88m the previous year.

Like most high street retailers, it endured a torrid Covid-19 and engaged in a formal financial restructuring through a company voluntary arrangement.

In the autumn of 2023, it completed a £100m refinancing deal with Blazehill Capital and Wells Fargo.

A spokesperson for New Look declined to comment specifically on the appointment of Rothschild, but said: “Management are focused on running the business and executing the strategy for long-term growth.

“The company is performing well, with strong momentum driven by a successful summer trading period and notable online market share gains.”

Roughly 40% of New Look’s sales are now generated through digital channels, while recent data from the market intelligence firm Kantar showed it had moved into second place in the online 18-44 category, overtaking Shein and ASOS.

The Coca-Cola Company is brewing up a sale of Costa, Britain’s biggest high street coffee chain, more than six years after acquiring the business in a move aimed at helping it reduce its reliance on sugary soft drinks.

Sky News can exclusively reveal that Coca-Cola is working with bankers to hold exploratory talks about a sale of Costa.

Initial talks have already been held with a small number of potential bidders, including private equity firms, City sources said on Saturday.

Lazard, the investment bank, is understood to have been engaged by Coca-Cola to review options for the business and gauge interest from prospective buyers.

Indicative offers are said to be due in the early part of the autumn, although one source cautioned that Coca-Cola could yet decide not to proceed with a sale.

Costa trades from more than 2,000 stores in the UK, and well over 3,000 globally, according to the latest available figures.

It has been reported to have a global workforce numbering 35,000, although Coca-Cola did not respond to several attempts to establish the precise number of outlets currently in operation, or its employee numbers.

This weekend, analysts said that a sale could crystallise a multibillion pound loss on the £3.9bn sum Coca-Cola agreed to pay to buy Costa from Whitbread, the London-listed owner of the Premier Inn hotel chain, in 2018.

One suggested that Costa might now command a price tag of just £2bn in a sale process.

The disposal proceeds would, in any case, not be material to the Atlanta-based company, which had a market capitalisation at Friday’s closing share price of $304.2bn (£224.9bn).

At the time of the acquisition, Coca-Cola’s chief executive, James Quincey, said: “Costa gives Coca-Cola new capabilities and expertise in coffee, and our system can create opportunities to grow the Costa brand worldwide.

“Hot beverages is one of the few segments of the total beverage landscape where Coca-Cola does not have a global brand.

“Costa gives us access to this market with a strong coffee platform.”

However, accounts filed at Companies House for Costa show that in 2023 – the last year for which standalone results are available – the coffee chain recorded revenues of £1.22bn.

While this represented a 9% increase on the previous year, it was below the £1.3bn recorded in 2018, the final year before Coca-Cola took control of the business.

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Coca-Cola has been grappling with the weak performance of Costa for some time, with Mr Quincey saying on an earnings call last month: “We’re in the mode of reflecting on what we’ve learned, thinking about how we might want to find new avenues to grow in the coffee category while continuing to run the Costa business successfully.”

“It’s still a lot of money we put down, and we wanted that money to work as hard as possible.”

Costa’s 2022 accounts referred to the financial pressures it faced from “the economic environment and inflationary pressures”, resulting in it launching “a restructuring programme to address the scale of overheads and invest for growth”.

Filings show that despite its lacklustre performance, Costa has paid more than £250m in dividends to its owner since the acquisition.

The deal was intended to provide Coca-Cola with a global platform in a growing area of the beverages market.

Costa trades in dozens of countries, including India, Japan, Mexico and Poland, and operates a network of thousands of coffee vending machines internationally under the Costa Express brand.

The chain was founded in 1971 by Italian brothers Sergio and Bruno Costa.

It was sold to Whitbread for £19m in 1995, when it traded from fewer than 40 stores.

The business is now one of Britain’s biggest private sector employers, and has become a ubiquitous presence on high streets across the country.

Its main rivals include Starbucks, Caffe Nero and Pret a Manger – the last of which is being prepared for a stake sale and possible public market flotation.

It has also faced growing competition from more upmarket chains such as Gail’s, the bakeries group, which has also been exploring a sale.

Coca-Cola communications executives in the US and UK did not respond to a series of emails and calls from Sky News seeking comment on its plans for Costa.

A Lazard spokesperson declined to comment.