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British Prime Minister Liz Truss appears on BBC's Sunday Morning presented by Laura Kuenssberg in Birmingham on Oct. 2.Jeff Overs/BBC/Reuters

British Prime Minister Liz Truss said Sunday that she could have done a better job “laying the ground” for her package of unfunded tax cuts, but insisted she would push on with an economic plan that has caused turmoil on financial markets and weakened the country’s public finances.

Truss acknowledged that the U.K. faces “a very turbulent and stormy time,” but said her policies would lead to a “high-growth, low-tax economy” in the longer term.

The comments are unlikely to calm Truss’ Conservative Party, which opens its four-day annual conference on Sunday in the central England city of Birmingham amid plunging poll ratings and growing public discontent.

Truss took office less than a month ago, promising to radically reshape Britain’s economy to end years of sluggish growth. But the government’s Sept. 23 announcement of a stimulus package that includes 45 billion pounds ($50 billion) in tax cuts, to be paid for by government borrowing, sent the pound tumbling to a record low against the dollar.

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The Bank of England was forced to intervene to prop up the bond market, and fears that the bank will soon hike interest rates caused mortgage lenders to withdraw their cheapest deals, causing turmoil for homebuyers.

“I have learned from that,” Truss told the BBC. “I will make sure in future we do a better job of laying the ground.”

Truss stuck to her insistence that Britain’s economic problems were part of a global spike in inflation and energy prices spurred by Russia’s invasion of Ukraine.

In a bid to calm the market turmoil, Truss and her finance minister, Chancellor of the Exchequer Kwasi Kwarteng, have said they will set out a medium-term fiscal plan on Nov. 23, alongside an economic forecast from the independent Office for Budget Responsibility.

Many economists, and many Conservatives, say that means weeks more economic turmoil are ahead. Michael Gove, who served as a senior minister in previous Conservative governments, said the announcement “will have to be brought forward” and some parts of the economic package will have to be dropped.

Gove said there was “an inadequate realization at the top of government about the scale of change required.”

Many Conservative lawmakers are worried that a leader chosen to replace Prime Minister Boris Johnson for her boosterish promises of economic growth has set the party on course for defeat in the next general election, due by 2024. Opinion polls suggest the opposition Labour Party is opening up a substantial lead.

Some delegates arriving for the conference in Birmingham were gloomy about the future of the party, which has been in power since 2010.

“I think it’s going to be a rocky conference, definitely,” said Daniel Pitt, a party member from Erewash in central England. “The prime minister has to try and steady the ship.”

Truss said she would “do what I can to win the hearts and minds of my colleagues across the Conservative Party” – but that doesn’t appear to include changing course.

Truss said she wouldn’t ditch the most unpopular part of her economic package, a decision to scrap the top 45% rate of income tax paid on earnings above 150,000 pounds ($167,000) a year. And she wouldn’t say whether there will have to be cuts to welfare and public services to pay for lower taxes.

Asked if the Cabinet as a whole had decided on the cut to the top tax rate, Truss said “no … It was a decision the chancellor made.”

“I think there has been too much focus in politics on the optics or how things look,” Truss said. She said she was confident her policies would get the economy growing by 2.5% annually – a target the U.K. hasn’t hit for years.

Labour Party economy spokeswoman Rachel Reeves accused the Conservative government of “doing some sort of mad experiment with the U.K. economy” and ignoring “the anxiety and fear” felt by millions of ordinary people.

“The idea that trickle-down economics is somehow going to deliver the 2.5% growth we all want to see is for the birds,” Reeves told the BBC.