If Boris Johnson loses the confidence vote by Tory MPs, the Conservative Party will face a fresh leadership election.

These are the likely contenders.

– Liz Truss

Foreign Secretary Liz Truss
Foreign Secretary Liz Truss (Kirsty O’Connor/PA)

Her hard line on Ukraine, insisting Russian forces must be driven from the country, and threats to tear up the Northern Ireland Protocol with the EU play well with sections of the party.

Popular with grassroots party members, she has been cultivating support among MPs, reportedly hosting potential backers for “fizz with Liz” in her Commons office earlier this year.

– Jeremy Hunt

Jeremy Hunt
Former foreign secretary Jeremy Hunt (Dominic Lipinski/PA)

While he has suggested this is not the time for another leadership election, he will know that he may never get another opportunity if he does not run.

As chairman of the Commons Health Committee, he has used his position to make a number of critical interventions on the Government’s handling of the pandemic, although his strong support for lockdown measures will not have pleased all Tory MPs.

– Rishi Sunak

Chancellor Rishi Sunak
Chancellor Rishi Sunak (Daniel Leal/PA)

However his stock has taken a tumble more recently following disclosures that his wife had non-dom status for tax purposes and he held on to his US green card while serving in Government.

He has also come under fire both for high levels of taxation and for being slow to respond to the cost-of-living crisis, although supporters will hope his latest £21 billion support package will finally put to bed criticism on the second point.

– Penny Mordaunt

Trade Minister Penny Mordaunt
Trade Minister Penny Mordaunt (David Mirzoeff/PA)

Having played a prominent role in the Leave campaign in the 2016 Brexit referendum, she was viewed as paying the price for backing Mr Hunt in the 2019 leadership contest when one of Mr Johnson’s first acts on entering No 10 was to sack her as defence secretary.

She reportedly has the backing of Dame Andrea Leadsom, another committed Brexiteer, whose intervention last week strongly criticising the Prime Minister is thought to have helped tip some MPs into submitting letters.

– Ben Wallace

Defence Secretary, Ben Wallace
Defence Secretary Ben Wallace (Dominic Lipinski/PA)

Mr Wallace, who served in the Scots Guards, remains a key voice in the UK’s response to Russia’s renewed invasion of Ukraine and this increased exposure could assist any leadership bid.

– Tom Tugendhat

Tom Tugendhat
Tom Tugendhat (House of Commons/PA)

A Remainer in 2016, the former soldier has been a trenchant critic of Mr Johnson – a stance that would appear to have cost him any chance of ministerial preferment under the current leadership.

He recently sought to distance himself from a call by his fellow Remainer, Defence Committee chairman Tobias Ellwood, for the UK to rejoin the EU single market.

– Nadhim Zahawi

Education Secretary Nadhim Zahawi
Education Secretary Nadhim Zahawi (Stefan Rousseau/PA)

A successful businessman, he came to wider prominence as vaccines minister during the pandemic and was credited with playing a key part in the successful rollout of the jab.

Born in Iraq to a Kurdish family, he came to the UK as a nine-year-old when his parents fled the regime of Saddam Hussein.