To be included on the ballot paper, leadership candidates need support from at least 100 Conservative MPs.
Public endorsements mean Mr Sunak has surpassed this threshold – with 121 backers – and Mr Johnson’s allies claim he has the numbers required to run too.
However, the latest Sky News tally suggests just 56 MPs have confirmed they would support Mr Johnson’s campaign to be prime minister for the second time.
One of Mr Sunak’s supporters – Richard Holden – rejected claims that Mr Johnson had 100 MPs behind him, and said this number of public endorsements had not been made “because they don’t exist”.
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The only person who has thrown their hat into the ring, Commons Leader Penny Mordaunt, has received endorsements from 23 of her peers.
The current contest has been expedited following Liz Truss’s resignation as prime minister, and nominations for the ballot paper are due to close at 2pm tomorrow afternoon.
If all three candidates were to receive 100 backers, there would be a vote by MPs – with the winning two put forward to the party membership.
A vote would then take place, meaning the new leader would be chosen by Friday.
In a significant moment for Team Sunak, Kemi Badenoch threw her support behind the former chancellor after a string of big names had flocked to Mr Johnson.
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While she admitted that she had been a member of “the Boris Johnson fan club”, she warned the Tories are not “organising a popularity contest” – and the party is “not a vehicle for any one individual’s personal ambitions”.
Writing in The Sunday Times, Ms Badenoch said of her decision to endorse Mr Sunak: “Like any work colleagues, we had our disagreements, which I elaborated on when we were competitors in the same contest.
“Now it is imperative that I let people know the decisions he made that I knew were absolutely right.”
She also spoke of his attention to inflation and reining in of “unnecessary, wasteful spending”.
Meanwhile, former foreign secretary Dominic Raab said it is “difficult to see” how Mr Johnson could become prime minister again when he is “absorbed and distracted” by the issues surrounding partygate.
Speaking to Sky News, Mr Raab said he was “confident” Mr Sunak would run in the Tory leadership race and was the “standout candidate” among the field.
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Specialist search teams, police dogs and divers have been dispatched to find two sisters who vanished in Aberdeen three days ago.
Eliza and Henrietta Huszti, both 32, were last seen on CCTV in the city’s Market Street at Victoria Bridge at about 2.12am on Tuesday.
The siblings were captured crossing the bridge and turning right onto a footpath next to the River Dee in the direction of Aberdeen Boat Club.
Police Scotland has launched a major search and said it is carrying out “extensive inquires” in an effort to find the women.
Chief Inspector Darren Bruce said: “Local officers, led by specialist search advisors, are being assisted by resources including police dogs and our marine unit.”
Aberdeenshire Drone Services told Sky News it has offered to help in the search and is waiting to hear back from Police Scotland.
The sisters, from Aberdeen city centre, are described as slim with long brown hair.
Police said the Torry side of Victoria Bridge where the sisters were last seen contains many commercial and industrial units, with searches taking place in the vicinity.
The force urged businesses in and around the South Esplanade and Menzies Road area to review CCTV footage recorded in the early hours of Tuesday in case it captured anything of significance.
Drivers with relevant dashcam footage are also urged to come forward.
CI Bruce added: “We are continuing to speak to people who know Eliza and Henrietta and we urge anyone who has seen them or who has any information regarding their whereabouts to please contact 101.”
Britain’s gas storage levels are “concerningly low” with less than a week of demand in store, the operator of the country’s largest gas storage site said on Friday.
Plunging temperatures and high demand for gas-fired power stations are the main factors behind the low levels, Centrica said.
The UK is heavily reliant on gas for its home heating and also uses a significant amount for electricity generation.
As of the 9th of January 2025, UK storage sites are 26% lower than last year’s inventory at the same time, leaving them around half full,” Centrica said.
“This means the UK has less than a week of gas demand in store.”
The firm’s Rough gas storage site, a depleted field off England’s east coast, makes up around half of the country’s gas storage capacity.
Glasgow has been a city crying out for solutions to a devastating drugs epidemic that is ravaging people hooked on deadly narcotics.
We have spent time with vulnerable addicts in recent months and witnessed first-hand the dirty, dangerous street corners and back alleys where they would inject their £10 heroin hit, not knowing – or, in many cases, not caring – whether that would be the moment they die.
“Dying would be better than this life,” one man told me.
It was a grim insight into the daily reality of life in the capital of Europe’s drug death crisis.
Scotland has a stubborn addiction to substances spanning generations. Politicians of all persuasions have failed to properly get a grip of the emergency.
But there is a new concept in town.
From Monday, a taxpayer-funded unit is allowing addicts to bring their own heroin and cocaine and inject it while NHS medical teams supervise.
It may be a UK-first but it is a regular feature in some other major European cities that have claimed high success rates in saving lives.
Glasgow has looked on with envy at these other models.
One supermarket car park less than a hundred metres from this new facility is a perfect illustration of the problem. An area littered with dirty needles and paraphernalia. A minefield where one wrong step risks contracting a nasty disease.
It is estimated hundreds of users inject heroin in public places in Glasgow every week. HIV has been rife.
The new building, which will be open from 9am until 9pm 365 days a year, includes bays where clean needles are provided as part of a persuasive tactic to lure addicts indoors in a controlled environment.
There is a welcome area where people will check in before being invited into one of eight bays. The room is clinical, covered in mirrors, with a row of small medical bins.
We were shown the aftercare area where users will relax after their hit in the company of housing and social workers.
The idea is controversial and not cheap – £2.3m has been ring-fenced every year.
Authorities in the city first floated a ‘safer drug consumption room’ in 2016. It failed to get off the ground as the UK Home Office under the Conservatives said they would not allow people to break the law to feed habits.
The usual wrangle between Edinburgh and London continued for years with Downing Street suggesting Scotland could, if it wanted, use its discretion to allow these injecting rooms to go ahead.
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The stalemate ended when Scotland’s most senior prosecutor issued a landmark decision that it would not be in the public interest to arrest those using such a facility.
One expert has told me this new concept is unlikely to lead to an overall reduction in deaths across Scotland. Another described it as an expensive vanity project. Supporters clearly disagree.
The question is what does success look like?
The big test will be if there is a spike in crime around the building and how it will work alongside law enforcement given drug dealers know exactly where to find their clients now.
It is not disputed this is a radical approach – and other cities across Britain will be watching closely.