The Met are investigating allegations of misconduct in public office after emails appeared to show conversations between the ex-cabinet minister and paedophile financier about political matters, while the former was serving as business secretary in Gordon Brown's government back in 2009.
Ella Marriott, commander of the Met, said: "The reports will all be reviewed to determine if they meet the criminal threshold for investigation."
Tap here for the latest on the Epstein files
The messages were revealed as part of the latest tranche of Epstein files released by the US Justice Department.
Sir Keir, who sacked Mandelson as the government's Washington ambassador last year over his ties to the billionaire, has called on Lord Mandelson to quit the House of Lords and testify to an inquiry by the US Congress.
The prime minister has suggested Andrew Mountbatten-Windsor should also give evidence.
Late last night, it was announced Bill and Hillary Clinton had agreed to testify. They hope doing so will set "a precedent that applies to everyone", the former president's deputy chief of staff said.
Being named in the Epstein files is not a sign of wrongdoing, and Lord Mandelson, Mr Mountbatten-Windsor and the Clintons have all expressed regret about their past ties to the paedophile.
Lord Mandelson has not responded to the latest allegations. However, in an interview with The Times carried out last week but published on Monday, he referred to a "handful of misguided historical emails, which I deeply regret sending", and described Epstein as "muck that you can't get off your shoe".
What are the latest Mandelson claims?
In the latest tranche of Epstein files released by the US Justice Department, emails appear to show Lord Mandelson giving Epstein advance notice of a €500bn EU bank bailout in 2010.
Mandelson was emailed by Epstein, who wrote: "Sources tell me 500 b euro bailout , almost complete (sic)."
He then appears to reply: "Sd be announced tonight".
Epstein then asks if he is home, to which Mandleson replies: "Just leaving No10... will call".
The €500bn deal was approved the next day by European governments as they tried to pull the currency through the 2010 "Eurozone" crisis - where countries such as Greece, Portugal, Ireland, and Cyprus were unable to repay or refinance their government debt.
The UK did not contribute to the bailout. However, the then chancellor Alistair Darling was present in Brussels for the negotiations.
Read more on this story:
Sarah Ferguson's charity to close
Other emails appear to show Lord Mandelson telling Epstein he was "trying hard" to change government policy on bankers' bonuses at his request, months after the convicted sex trafficker had paid tens of thousands of pounds to the peer's husband.
The emails came at the time the so-called "super tax" was being introduced by Mr Darling to clamp down on bank profits being used to pay large bonuses for bankers after the financial crisis.
One discussion indicates Lord Mandelson encouraged JP Morgan's boss Jamie Dimon to call Mr Darling and "mildly threaten" him.
Separately, the peer also appeared to write to Epstein in June 2009 about an "interesting note that's gone to the PM", forwarding an assessment by Mr Brown's adviser Nick Butler of potential policy measures including an "asset sales plan".
Mr Brown condemned the "wholly unacceptable disclosure of government papers and information during the period when the country was battling the global financial crisis", and said he had asked the Cabinet Office to investigate.
Pressure over peerage
Sir Keir Starmer has asked Cabinet Secretary Sir Chris Wormald - the UK's most senior civil servant - to "urgently" review all available information on contact between Lord Mandelson and Epstein.
The prime minister's spokesperson also said Sir Keir believed Lord Mandelson "should not be a member of the House of Lords or use the title".
However, the government does not have the power to strip him of his peerage, and wants to work with the Lords to modernise disciplinary procedures to make it easier to remove disgraced peers.
Darren Jones, chief secretary to the prime minister, said the government was writing to the appropriate authorities to start the process.
Sky News has approached representatives for Lord Mandelson for comment on the leaking of sensitive information claims.
In a statement about previous allegations, he said: "I was wrong to believe Epstein following his conviction, and to continue my association with him afterwards. I apologise unequivocally for doing so to the women and girls who suffered."
What else have the files revealed?
Lord Mandelson was sacked as the ambassador to Washington last year after details emerged of his continued contact with the financier after Epstein's guilty plea in 2008 to soliciting prostitution and soliciting a minor.
In files released over the weekend, bank statements from 2003 and 2004 appeared to show Lord Mandelson received payments totalling $75,000 (£54,000) from the financier, while he was the MP for Hartlepool.
Epstein is also said to have paid for an osteopathy course for Lord Mandelson's husband in 2009.
Lord Mandelson resigned his membership of the Labour Party on Sunday night. He denied any record or recollection of the payments, but said he did "not wish to cause further embarrassment to the Labour Party".
The New Labour grandee has also appeared in a picture found in the files wearing only his underwear and a t-shirt, which Sky News has confirmed was taken in Epstein's Paris flat.
A spokesperson for Lord Mandelson previously told Sky News: "No one can say who or where the photo was taken. Lord Mandelson has absolutely no idea or indeed whether it has any connection to Epstein at all."
A spokesman for Sarah's Trust said: "Our chair Sarah Ferguson and the board of trustees have agreed that with regret the charity will shortly close for the foreseeable future."
"This has been under discussion and in train for some months," they added.
Epstein files: Catch up on the latest developments
The spokesman said "we remain extremely proud of the work of the trust over recent years", including delivering aid during the pandemic and to those impacted by the war in Ukraine.
It comes as the release of more of the Epstein files last Friday revealed further the extent of the former duchess's relationship with the deceased billionaire.
More emails to Epstein from a sender believed to be Ms Ferguson emerged on Monday - including two from 2010.
'I am at your service. Just marry me.'
On the evening of 30 January 2010, an account called "Sarah" told Epstein he was a "legend" and added: "I really don't have the words to describe, my love, gratitude for your generosity and kindness.
"I am at your service. Just marry me."
Sky News believes the sender was the former duchess. There is no indication as to what the email was in response to, or any further context around the message.
In another email in September 2010, a user called "Ferg" - which Sky News also believes to be Ms Ferguson - asked Epstein when he was going to "employ" her.
The financier, who was found dead in a New York jail cell in 2019 while awaiting trial on sex trafficking charges, replies that he will visit London in the coming weeks to "talk about it", adding: "I have never let you down."
"Ferg" responds: "Nor I you.. And bever [sic] will. My friendship is steadfast to the end, even after the body is cold .. Love you now and always.. And I know you do tooo .."
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In a 2011 interview, Ms Ferguson said: "I would never have anything to do with Jeffrey Epstein ever again. I abhor paedophilia and any sexual abuse of children. It was a gigantic error of judgment."
That came three years after Epstein's guilty plea in 2008 to soliciting prostitution, including with a minor.
Being named in the Epstein files is not a sign of wrongdoing.
The ban was imposed by FIFA's ruling executive along with European football's governing body, UEFA, at the start of Vladimir Putin's all-out invasion of Ukraine.
Mr Infantino told Sky News' Yalda Hakim "we have to" look at restoring Russian teams, adding: "This ban has not achieved anything, it has just created more frustration and hatred."
The ban was imposed in 2022 as European rivals said they wouldn't play or host Russia's matches.
With Ukraine fending off the full-scale war for four years, its government is enraged that FIFA wants Russia to be able to qualify for World Cups again.
Ukrainian sports minister Matvii Bidnyi said in a statement to Sky News: "Gianni Infantino's words sound irresponsible - not to say infantile. They detach football from the reality in which children are being killed."
Mr Bidnyi said over 100 footballers are among more than 650 Ukrainian athletes and coaches killed by Russians.
He added: "War is a crime, not politics. It is Russia that politicises sport and uses it to justify aggression. I share the position of the Ukrainian Association of Football, which also warns against Russia's return to international competitions.
"As long as Russians continue killing Ukrainians and politicising sport, their flag and national symbols have no place among people who respect values such as justice, integrity, and fair play."
Russia has been unable to play at a men's World Cup since hosting in 2018 - with Mr Infantino later receiving the Order of Friendship medal from Mr Putin.
Mr Bidnyi also recently used a Sky News interview to criticise the International Paralympic Committee for lifting its ban on Russia and war ally Belarus.
In a statement, Mr Musk said the deal would create "the most ambitious, vertically-integrated innovation engine on (and off) Earth, with AI, rockets, space-based internet, direct-to-mobile device communications and the world's foremost real-time information and free speech platform".
The world's richest man, who also owns Tesla, social media platform X, and satellite communications company Starlink, said the combination would aim to develop AI data centres in space, and called the move "not just the next chapter, but the next book in SpaceX and xAI's mission".
X, formerly Twitter, was itself bought by xAI last year. Mr Musk bought Twitter in 2022 for $44bn (£38bn).
A $1trn company
Of the latest deal, Mr Musk wrote: "In the long term, space-based AI is obviously the only way to scale.
"The only logical solution therefore is to transport these resource-intensive efforts to a location with vast power and space. I mean, space is called 'space' for a reason.
"By directly harnessing near-constant solar power with little operating or maintenance costs, these satellites will transform our ability to scale compute.
"It's always sunny in space."
The combined company would have a valuation of $1.25trn (£910bn), according to Bloomberg, and the deal comes ahead of SpaceX's anticipated initial public offering, expected to be announced later this year.
SpaceX are not the only company to explore the idea of putting AI data centres in space.
Google last year revealed a new research project called Project Suncatcher that would equip solar-powered satellites with AI computer chips.
Mississippi officials last month announced that xAI is set to spend $20bn (£14.6bn) to build a data centre near the state's border with Tennessee.
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SpaceX's acquisition of xAI comes weeks after X came under fire following complaints that users were using the platform's AI chatbot, Grok, to make sexualised photos of real women and children
It prompted an investigation by the UK's independent online safety watchdog, Ofcom, and calls from Prime Minister Sir Keir Starmer for the platform to comply with UK laws "immediately".
The company has since announced the AI tool will no longer be able to undress pictures of real people.
"We have implemented technological measures to prevent the Grok account from allowing the editing of images of real people in revealing clothing such as bikinis," X previously said in a statement.
"This restriction applies to all users, including paid subscribers."
Harvey, 15, was stabbed outside the canteen at All Saints Catholic High School in Sheffield last year by a fellow pupil.
On the one-year anniversary of their son's death, Mark and Caroline Willgoose say they have been "devastated" by a new report into "chances missed" by Harvey's school to assess the risk his killer posed.
Mohammed Umar Khan, also 15 at the time of the attack, had brought a 13cm hunting knife into school on the day he fatally stabbed Harvey.
He was sentenced to life with a minimum of 16 years in prison following a trial at Sheffield Crown Court.
'Harvey deserved better'
But an independent review, commissioned by the school itself, revealed school failures in the months leading up to Harvey's murder, including:
Speaking at a news conference in Sheffield, Harvey's mother Caroline Willgoose said: "Reading the findings of this report has been devastating.
"To see in black and white the chances there were to step in, the signs that were missed and how many opportunities there were to protect my boy is something I'll carry with me for the rest of my life.
"Harvey deserved better."
'No other family' should go through this
Mark Willgoose said they have had "no apology" from the school, following the publication of the report.
"We would like one," Ms Willgoose added.
The report has only been shared in abbreviated form with the media, but a full copy has been shared with Harvey's family.
They called on the school's trust, St Clare Catholic Multi Academy Trust, to publish the report in full for "transparency" and so lessons can be learned by them and all schools.
Ms Willgoose said: "No other family should have to sit in court listening to how their child was killed, or have to read a report that lays bare how their child could have been better protected."
School has introduced 'robust measures'
Sky News contacted St Clare Catholic Multi Academy Trust for comment.
In a statement, chief executive Steve Davies said: "Harvey's death was a profound tragedy for our community and our thoughts remain with his family.
"It is clear that the report identifies areas for improvement, including in relation to our processes, information-sharing, and training."
He added the school had "already implemented a number of robust measures over the last year".
The report also outlined 10 recommendations, including mandatory record-sharing at the outset of any pupil school move, a clear weapons-response policy and national guidance on how schools respond to knife possession and reports of knife possession.
A Department for Education spokesperson told Sky News it will "reflect on the report findings".
It encouraged "all schools to do the same".