Prime Minister Liz Truss apologised for threatening Britain's economic stability after she was forced to scrap her vast tax-cutting plans and embark on a programme of "eye-watering" public spending cuts instead.

British Prime Minister Liz Truss 

After weeks of blaming the markets and "global headwinds" for investors dumping the pound and government bonds, Truss said she was sorry for going "too far and too fast" with her radical economic plan to snap Britain out of years of stagnant growth.

Markets, which plunged after her Sept. 23 "mini-budget", are still under strain even after Truss's finance minister Jeremy Hunt tore up her plans on Monday, and she is now fighting to survive, just six weeks after she became prime minister.

It was not clear whether Truss's apology would quell a growing rebellion in her ruling Conservative Party, with a handful of lawmakers urging her to quit. Dozens fear they will lose their jobs at the next election.

Even one of her ministers said she could not afford to make any more mistakes - something that could be difficult when her government looks for deep savings which could deepen an expected recession. Already Hunt has refused to guarantee the budgets of departments such as health and defence.

A new YouGov opinion poll suggested even those Conservative Party members who backed her for prime minister were having second thoughts. It showed more than half of those members polled said she should resign, while a third wanted her predecessor, Boris Johnson, to replace her.

"I do want to accept responsibility and say sorry for the mistakes that have been made," Truss told the BBC late on Monday.

"I wanted to act to help people with their energy bills, to deal with the issue of high taxes, but we went too far and too fast." She added she was "sticking around" and that she would lead the Conservatives into the next election due in about two years time, although the statement was accompanied by a laugh.

Truss watched silently in parliament on Monday as Hunt demolished the economic plan she proposed less than a month ago, and which triggered a bond market rout so deep that the Bank of England had to act to prevent pension funds from collapsing.