It came as the foreign minister gained the support of Lord Frost as her campaign gained momentum.
Miss Truss tightened her grip on third place in the contest, collecting 14 additional votes on the second ballot.
And she will enlist Ms Braverman’s support, sources said last night. So far, her further momentum has been sapped when the Attorney General refused to give up on her doomed campaign.
Liz Truss at the launch of her campaign as Conservative Party leader and Prime Minister at the King’s Buildings, Smith Square, London yesterday
Miss Truss tightened her grip on third place in the contest yesterday, collecting an extra 14 votes on the second ballot
Lord Frost wrote in the Telegraph: “Liz’s wealth of experience, energy and ideas – plus the simple fact that she has the most votes of the three – put her at the top.”
Last night she attracted more heavyweight support in her battle to make the last two.
Lord Frost has urged Kemi Badenoch to withdraw from the Tory leadership race and support Miss Truss.
writing for them Daily Telegraph, said Lord Frost: ‘We need unity among the free market people. Kemi and Suella Braverman create compelling programs for change with different focuses.
“But Liz’s vast experience, energy and ideas – plus the simple fact that she has the most votes of the three – put her at the top.
He added: “Now is the time for pragmatism. I urge Kemi to retire in exchange for a serious job in a Truss administration.«
Earlier, a friend of Lord Frost said he would formally endorse Miss Truss and urge fellow candidates on the right of the party to unite behind her.
“While Suella, Kemi and Penny are all extremely good candidates, he believes Liz’s apparent determination to lead Britain onto a new, reforming free-market path gives her an advantage,” they said.
“He thinks it’s time for all three to unite behind her.”
A number of up-and-coming Tory MPs are also expected to back Miss Truss, including former Health Secretary Ed Argar, Home Secretary Tom Pursglove and Defense Secretary James Heappey, who is close to Defense Secretary Ben Wallace.
Brexiteer Steve Baker, who had supported Ms Braverman, will now also support Miss Truss.
The Secretary of State used her campaign start yesterday to promise continuity on key promises made by Mr Johnson, such as alignment, while at the same time breaking with former Chancellor Rishi Sunak’s economic policies.
Although Ms. Truss is ready to have her support, Ms. Braverman hinted that she might not support Miss Truss at all, saying that the Secretary of State’s decision to promote Remain six years ago was a “factor” in her decision would be
A friend of Lord Frost said he would officially support Miss Truss and urge other candidates on the right of the party to unite behind her
There had been anger at Mrs. Braverman’s refusal to step aside and lend Miss Truss her supports.
An ally said: “If she were down in the morning we could have expected a significant number of her people to turn up, which gives Liz momentum for the weekend. A golden opportunity was missed.’
But Ms Braverman hinted she might not support Miss Truss at all, saying the Secretary of State’s decision to promote Remain six years ago would be a “factor” in her decision.
Speaking in central London yesterday, Ms Truss highlighted her experience as a former Treasury Secretary and said she was the only candidate with the experience of offering a credible economic alternative to Mr Sunak.
“We are at a critical moment for our country,” she said. “Now is the time to be bold, we cannot have business-as-usual economic management that has led to decades of low growth.”
She promised to introduce “bold supply-side reforms,” including “tax cuts.”
Miss Truss also said she opposed Mr Sunak’s increase in Social Security and would abolish it if elected.
And she defended her decision to stand by Boris Johnson when others failed him.
“I’m a loyal person. I’m loyal to Boris Johnson,” she said.
“I supported the aspirations of our Prime Minister and I want to deliver on the promise of the 2019 Manifesto.
“What we have to do now is deliver, deliver, deliver and I’m the person in this race who has the delivery record.”