LONDON (Reuters) - Some lawmakers in Prime Minister Theresa May’s Conservative Party have said they have submitted letters of no confidence in the British leader.

Britain's Prime Minister Theresa May returns to Downing Street in London, Britain, December 10, 2018. REUTERS/Toby Melville

A leadership challenge is triggered if 48 Conservatives write such letters to the chairman of the party’s so-called 1922 committee, Graham Brady. May could be toppled if 158 of her 315 lawmakers vote against her.

Brady said last month the threshold to trigger a vote had not yet been reached.

Lawmakers do not have to reveal publicly whether they have written a letter, but those below have chosen to do so:

1) JACOB REES-MOGG - submitted his letter in November

“It is of considerable importance that politicians stick to their commitments or do not make such commitments in the first place. Regrettably, this is not the situation,” he said in his letter.

2) HENRY SMITH - tweeted a picture of his letter in November

3) SHERYLL MURRAY - said in November she had submitted a letter

4) ANNE MARIE-MORRIS - said in November she had submitted a letter

“I am not alone and I do it with a heavy heart but now it’s the country that matter more than absolutely anything else,” she told the BBC.

5) LEE ROWLEY - said in November he had submitted a letter

“I’ve written that because sadly I have come to the conclusion that the prime minister isn’t going to change her policy and I wish she would,” he told ITV news.

6) STEVE BAKER - submitted his letter on Oct. 22.

“While I am clear these (proposals) will be defeated in the commons, there seems little point allowing the Captain to continue running the ship towards the rocks and so I write with regret to request a vote of no confidence in our leader.”

7) SIMON CLARKE - “My letter is in,” he told reporters in November outside a meeting of the influential ERG euroskeptic group of Conservative lawmakers.

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8) JAMES DUDDRIDGE - announced he had submitted his letter just minutes before May took to the stage for her speech at the Conservative annual conference in October

9) ANDREA JENKYNS - submitted her letter in June

“She can fight it. But I am confident she will not win it. Time to save Brexit and our party with a new leader,” she said on Twitter.

10) ANDREW BRIDGEN - submitted his letter in July

“All we have asked from the Prime Minister, is that she sticks to what she has promised on repeated occasions when she declared that ‘Brexit means Brexit’ and pledged to take back control of our money, borders and laws. But it now appears those promises are all a pretence and a charade intended to dupe the electorate,” he said in his letter, according to media reports.

11) PHILIP DAVIES - submitted his letter in July

“Politics is all about trust and once it is lost it is impossible to win back,” he said in a letter to constituents.

12) PETER BONE - submitted his letter some time ago

“I’ve always wanted the policy to change not necessarily the prime minister but when the prime minister won’t change the policy the only way to change the policy is to change the prime minister,” he told the BBC on Thursday.

13) NADINE DORRIES - submitted her letter some weeks ago

“The writing has been on the wall for some time,” she said on Twitter on Thursday.

14) MARTIN VICKERS - submitted his letter in July

“It was clear at that time further concessions were inevitable & now we have a much worse agreement that fails to deliver what my constituents voted for in the referendum when they delivered a considered verdict that we should leave,” he told a local newspaper reporter.

15) ADAM HOLLOWAY - submitted his letter in November

“My letter of no confidence has now been delivered - with regret. Mrs May is a remarkable woman - just look at her fortitude today in the House of Commons, even more please remember her long career of public service.”

16) JOHN WHITTINGDALE - told the BBC in November he had submitted a letter

17) LAURENCE ROBERTSON - told the BBC his letter was submitted months ago

“I was concerned at the direction Theresa May was taking these negotiations and was dragging them out, and I wrote that letter some months ago.”

18) MARK FRANCOIS - said he had submitted his letter, titled “She Just Doesn’t Listen”, in November

“For the sake of the Conservative Party and indeed for our country’s destiny, I honestly believe that (it) is now time to seek fresh leadership that can carry this country forward outside of the European union and confidently into the world.”

19) MARIA CAULFIELD - confirmed via her office that she has submitted a letter.

20) BEN BRADLEY - confirmed via his office that he has submitted a letter.

21) CHRIS GREEN - said on Twitter he had sent a letter.

“My constituents want a clean break from the European Union, taking back control of our laws, our borders, our money and our trade. The withdrawal proposal from the prime minister will not help deliver that result.”

22) ZAC GOLDSMITH - wrote in the Sunday Telegraph that he had submitted a letter

“The Prime Minister has been clear that she will not change course, and so with huge reluctance, I have submitted a letter ... urging a vote that will, I hope, give us the chance of a fresh start.”

23) ANDREW LEWER - wrote on his website that he had sent a letter

“Now that the withdrawal deal has been passed by the EU Council and the scale of the appalling mismanagement of the negotiations has become apparent, led by the Prime Minister, I can confirm that I have now submitted a letter to the Chairman of the 1922 committee.”

24) PHILIP HOLLOBONE - told BBC Radio he sent a letter in July

25) CRISPIN BLUNT - told the Times newspaper he had sent a letter of no confidence