One member of the executive of the 1922 Committee of Conservative lawmakers, which sets the rules for selecting and changing the party's leader, said the "odds are against" Britain's Liz Truss surviving the day as prime minister, an ITV journalist reported.

The committee is expected to meet later to discuss the leadership crisis, ITV's UK Editor Paul Brand said on Twitter, as 11 Conservative MPs so far said they have submitted a letter of no confidence in Truss to Graham Brady, chair of the party's backbench 1922 Committee.

Truss's premiership came under renewed pressure on Thursday, a day after a second top minister quit and rowing and jostling broke out among her lawmakers in parliament in a dramatic breakdown of unity and discipline.

Six weeks into the job, Truss has been buffeted by a bond market rout, suffered the lowest approval ratings of a British leader in decades, abandoned almost all of her policy program and has now lost her interior minister who quit on Wednesday, less than a week after she fired her Chancellor of the Exchequer Kwasi Kwarteng.

In a sign of the chaos, Downing Street issued a statement at 1:33 a.m. (0033 GMT) to say the prime minister had "full confidence" in the chief whip and her deputy.

Meanwhile, Transport Secretary Anne-Marie Trevelyan insisted that Truss still has the confidence of her cabinet of ministers.

"Liz Truss is our prime minister, and she has the confidence of the cabinet," Anne-Marie Trevelyan told BBC News on Thursday. 

Truss has been fighting for her political survival since September 23 when Kwarteng announced a "mini-budget" of vast, unfunded tax cuts that sent shockwaves through financial markets.

On Monday, the country's new Chancellor of the Exchequer Jeremy Hunt scrapped the financial plan unveiled by his predecessor.

On Wednesday, Home Secretary Suella Braverman announced her resignation due to "technical infringement of the rules" as she sent an official document from her personal email. 

Read more:

Can Liz Truss survive as UK Prime Minister?

(With input from Reuters)