There was no end point for the review, the spokeswoman said.
“We are looking at all the campaign pledges and we are looking at whether it is the right time to take them forward,” she said.
“We need to take some time to make sure what is deliverable and what is possible, and engaging with stakeholders and with the relevant secretaries of state as well.
More from Politics
“Obviously, those are pledges that were made a few months ago now and the context is somewhat different, obviously, economically.
Among the critics, the British Medical Association (BMA) said the plans would “make matters worse” and threaten the principle of free NHS care at the point of need.
This morning, Transport Secretary Mark Harper also cast doubt on the high speed rail link connecting Manchester and Leeds, saying the government is looking at “all the options” ahead of expected spending cuts in the autumn statement later this month.
Key pledges made by Mr Sunak in the leadership contest include:
Cut the basic rate of income tax from 20p to 16p by the end of the next parliament
Scrap or reform all EU legislation by the next election
Continue the Rwanda deportation scheme, alongside a 10-point plan to tackle immigration
Block housing on the greenbelt
Rail improvements in the North, including HS2 trains up to Leeds
Commit to reaching net zero emissions by 2050.
The PM’s spokeswoman was also asked if Mr Sunak is committed to the 2019 manifesto pledge not to raise taxes, and said that, while the PM strives for a low tax economy, “a lot of things have happened” since then and “we are feeling effects”.
The admission from Downing Street is likely to fuel fresh calls for a general election, which opposition parties have been demanding since the collapse of Boris Johnson’s government in July.
Mr Sunak took on Liz Truss for the Tory leadership over the summer, but lost out to her in the race to succeed Mr Johnson after Tory party members favoured her tax-slashing plan for growth over his fiscally conservative policies.
However, the former chancellor saw a swift reversal in fortunes when Ms Truss resigned after just 44 days in the job.
He won the support of Tory MPs and became leader in a swift second leadership contest that didn’t go to the wider party membership.
He now faces the task of balancing the books following the fallout from his predecessor’s disastrous mini-budget.
Staff at a zoo in Germany which culled 12 baboons and fed some of their carcasses to the lions say they have received death threats.
Tiergarten Nuremberg euthanised the healthy Guinea baboons at the end of July due to overcrowding in their enclosure.
Some remains were used for research while the rest were fed to the zoo’s carnivores.
Plans to kill the baboons were first announced last year after the population exceeded 40, and protestors gathered outside the zoo to show their outrage.
When the site closed last Tuesday to carry out the cull, several activists were arrested after climbing the fence.
The director of the zoo defended the decision, saying efforts to sterilise and rehome some baboons had failed.
“We love these animals. We want to save a species. But for the sake of the species, we have to kill individuals otherwise we are not able to keep up a population in a restricted area,” Dr Dag Encke told Sky News.
Image: These are not the specific animals involved. File pics: Reuters
‘The staff are suffering’
He said police are investigating after he and the staff were sent death threats.
“The staff are really suffering, sorting out all these bad words, insults and threats,” Dr Encke said.
“The normal threat is ‘we will kill you, and we’ll feed you to the lions’.
“But what is really disgusting is when they say that’s worse than Dr Mengele from the National Socialists, who was one of the most cruel people in human history.
“That is really insulting all the victims of the Second World War and the Nazi regime.”
Josef Mengele was a Nazi officer who performed deadly experiments on prisoners at the Auschwitz concentration camp during the Second World War.
Image: Dr Dag Encke
Zoo animals ‘treated as commodities’
Culling animals and feeding them to predators isn’t unheard of in zoos.
At the time, the zoo said it was due to a duty to avoid inbreeding.
Dr Mark Jones, a vet and head of policy at Born Free Foundation, a charity which campaigns for animals to be kept in the wild, denounced the practice and said thousands of healthy animals are being destroyed by zoos each year.
“It reflects the fact animals in zoos are often treated as commodities that are disposable or replaceable,” he said.
Image: Marius the giraffe was put down and publicly fed to lions at at Copenhagen Zoo in Denmark. Pic: Keld Navntoft/AFP/Getty
Zoo asks for unwanted pets
Earlier this week, a zoo in Denmark faced a backlash for asking for unwanted pets to be donated to be used as food for its predators.
In a Facebook post, Aalborg Zoo said it could take smaller live animals such as chickens, rabbits and guinea pigs, as well as horses under 147cm. It said the animals would be euthanised by specially trained staff before being fed to carnivores like the European lynx.
While some people supported the scheme, saying they had donated animals in the past, others are outraged.
“The very idea of a zoo offering to take unwanted pets in order to kill them and feed them to their predators will, I think, horrify most right-minded people,” said Dr Jones.
Aalborg Zoo has now closed the post to comments and said in a statement: “For many years at Aalborg Zoo, we have fed our carnivores with smaller livestock.
“When keeping carnivores, it is necessary to provide them with meat, preferably with fur, bones, etc., to give them as natural a diet as possible.
“Therefore, it makes sense to allow animals that need to be euthanised for various reasons to be of use in this way.
“In Denmark, this practice is common, and many of our guests and partners appreciate the opportunity to contribute.”
Donald Trump could meet Vladimir Putin in person as early as next week to discuss a ceasefire in Ukraine, a White House official has said.
They said the meeting would be conditional on the Russian president meeting his Ukrainian counterpart Volodymyr Zelenskyy, Sky News’s US partner network NBC News reported.
It came days before the White House’s deadline for Russia to reach a peace deal with Ukraine or face severe economic penalties, which could also target countries buying its oil.
Asked during a news conference at the White House if the talks would take place, Mr Trump said: “There’s a very good prospect that they will.”
He said it had not been determined where the talks would take place, but added: “We had some very good talks with President Putin today.”
However, he said: “I’ve been disappointed before with this one.”
Asked if Mr Putin made any kind of concession to lead to the development, Mr Trump did not give much away, but added: “We’ve been working on this a long time. There are thousands of young people dying, mostly soldiers, but also, you know, missiles being hit into Kyiv and other places.”
Trump might finally be a step closer to ending the war
Seven hours is a long time in US politics.
At 10am, Donald Trump accused Russia of posing a threat to America’s national security.
At 5pm, Trump said there was a “good prospect” of him meeting Vladimir Putin “soon”.
There had, he claimed, been “great progress” in talks between his special envoy Steve Witkoff and the Russian president.
It’s difficult to gauge the chances of a meeting between the two leaders without knowing what “great progress” means.
Is Russia “inclined” towards agreeing a ceasefire, as Ukraine’s president now claims?
Is Putin prepared to meet with his Ukrainian foe Volodymyr Zelenskyy, too?
The very fact that we’re asking those questions suggests something shifted on a day when there was no expectation of breakthrough.
Trump repeatedly vowed to end the war within 24 hours of becoming president.
On day 198 of his presidency, he might, just might, be one step closer to achieving that.
More tariffs ‘could happen’
Mr Trump also said he could announce further tariffs on China similar to the 25% he announced on India over its purchases of Russian oil.
“Could happen,” he said, after saying he expected to announce more secondary sanctions intended to pressure Russia into ending its war with Ukraine.
Earlier, he imposed an additional 25% tariff on Indian goods, on top of a previous 25% tariff, over its continued purchases of Russian oil.
India’s foreign ministry spokesperson said the additional tariffs were “unfair, unjustified and unreasonable”.
Image: Vladimir Putin welcomes Steve Witkoff during a meeting in Moscow. Pic: Sputnik/Reuters
It came after Mr Putin held talks with Mr Trump‘s special envoy Steve Witkoff in Moscow, with the meeting lasting around three hours.
In a post on Truth Social, Mr Trump said Mr Witkoff “had a highly productive meeting” with Mr Putin in which “great progress was made”.
He said he had updated America’s European allies, and they will work towards an end to the Russia-Ukraine war “in the days and weeks to come”.
Please use Chrome browser for a more accessible video player
4:11
Correspondents in Washington and Moscow break down a busy day of diplomacy
‘The war must end’
Mr Zelenskyy later said he and Mr Trump spoke on the phone after the meeting. He said “European leaders also participated in the conversation” and “we discussed what was said in Moscow”.
He added: “Our common position with our partners is absolutely clear: The war must end. We all need lasting and reliable peace. Russia must end the war that it started.”
Mr Zelenskyy later said: “It seems that Russia is now more inclined to agree to a ceasefire.”
He added that the pressure on Moscow “is working”, without elaborating, and stressed it was important to make sure Russia does not “deceive us or the United States” when it comes to “the details” of a potential agreement.