US President Donald Trump has said he is immediately ending all trade negotiations with Canada.

He wrote on Truth Social that the country had run an advert featuring former President Ronald Reagan speaking negatively about tariffs.

"Based on their egregious behavior, ALL TRADE NEGOTIATIONS WITH CANADA ARE HEREBY TERMINATED," Trump wrote late on Thursday.

The US president has imposed a 35% levy on Canadian imports, although he has allowed exemptions for goods that fall under the USMCA - a free trade agreement with Mexico and Canada that Trump negotiated during his first term.

Trump has also imposed sector-specific levies on Canadian goods, including 50% on metals and 25% on automobiles.

This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version.

You can receive Breaking News on a smartphone or tablet via the BBC News App. You can also follow @BBCBreaking on X to get the latest alerts.

Sir Keir Starmer will push allies to provide Ukraine with more long-range missiles to strike Russian targets at a meeting in London on Friday.

The prime minister will host Ukrainian President Volodymyr Zelensky along with the so-called "coalition of the willing", comprising of more than 20 of Ukraine's allies who have agreed to provide Kyiv security guarantees once a ceasefire is brokered.

Zelensky has been pleading for weeks for more long-range weapons from the West, a move Russia has warned would escalate the conflict.

Ukraine's leader is travelling from Brussels, where he met EU leaders on Thursday seeking financial support.

Zelensky arrives off the back of two diplomatic wins this week: Donald Trump's decision to finally apply further sanctions against Russia, and the European Union agreeing to fund a Ukrainian budget hole.

Sir Keir is hoping to maintain the momentum by increasing the pressure on Moscow to negotiate an end to the war.

Among the leaders attending Friday's summit will be Nato Secretary General Mark Rutte, Denmark's Prime Minister Mette Frederiksen and Netherlands' Dick Schoof. Others including French President Emmanuel Macron will join virtually.

Sir Keir will urge leaders to ramp up the provision of long-range weapons after a successful attack on a chemical plant in Bryansk, Russia, using British-supplied Storm Shadow missiles.

"The only person involved in this conflict who does not want to stop the war is President Putin," Sir Keir said.

"And his depraved strikes on young children in a nursery this week make that crystal clear," he added.

Two children were among at least seven killed in a wave of Russian strikes on Ukraine, which hit a nursery in the second biggest city Kharkiv.

Sir Keir will also announce 100 additional air defence missiles will be delivered to Ukraine earlier than planned, as outlined in a £1.6bn deal struck between the UK and Ukraine in March.

"Time and again we offer Putin the chance to end his needless invasion, to stop the killing and recall his troops, but he repeatedly rejects those proposals and any chance of peace," Sir Keir said.

Long-range missiles have become a key demand in Zelensky's talks with allies.

US President Donald Trump floated the possibility of the US selling Tomahawk cruise missiles to Ukraine, but Zelensky came away empty-handed from a White House meeting last week.

Sir Keir will consult Western allies on how to take Russian oil and gas off the global market.

They will also discuss using frozen Russian assets to provide Ukraine with financial loans, although the plan faced a lack of political consensus and legal hurdles at the Brussels summit on Thursday.

The EU stopped short of agreeing to a proposal to use up to €140bn (£122bn) in frozen Russian assets to financially prop up Ukraine.

However, the leaders agreed to help support Ukraine's "financial needs" for the next two years.

The US also announced sanctions on Wednesday against Russia's two largest oil companies, Rosneft and Lukoil, as part of efforts to add financial pressure on Moscow to enter ceasefire negotiations.

Russia launched its full-scale invasion of Ukraine in February 2022. It currently controls about 20% of Ukrainian territory, including the southern Crimea peninsular Moscow annexed in 2014.

It's a mess. And it is extraordinarily difficult.

To give you a sense of that, one of the candidates to rule themselves out of chairing the grooming gangs inquiry is Jim Gamble.

Gamble's career goes like this: he worked in policing in Northern Ireland during The Troubles.

And then he spent years working to protect children from exploitation.

Neither are roles for the faint hearted, to put it lightly. And yet not even he wanted to take on chairing this inquiry.

So who on Earth would want to do it?

There is a reluctant acceptance in government that finding someone who is willing to do it, will last the course and will be universally accepted among the victims as the right person for the job is almost certainly impossible.

Little wonder then that those in government are making it known they are willing to spend months finding the right person to do it.

The best they can hope for, in all likelihood, is someone backed enthusiastically by some and tolerated by others.

"There is no such thing as a clean skin. Anyone with the necessary expertise and clout will likely come with what some will perceive as baggage," one Whitehall source told me.

And the personnel issues don't end there.

There has been a row over the last few days about whether the Safeguarding Minister Jess Phillips should stay in her job – after some of those victims involved in setting up the inquiry said she should be replaced.

When we first reported that news, I was reminded of a thing reporters like me should always keep in mind. Journalists, inevitably, lean towards the outspoken, who generate headlines.

Rightly so – choosing to be outspoken, to go public with deeply held concerns, is often brave and noble. But reporters also shouldn't forget those who have chosen to remain quiet.

The vast majority of the 30 victims recruited to the panel being consulted in setting up the inquiry have not spoken out publicly.

Multiple sources in government are making it clear there is a widespread determination – from No10 to the Home Office - to keep Phillips in post.

And the latest twist is five other abuse survivors have written to the prime minister to say they will only continue to work with the inquiry if Phillips keeps her job.

It is another impossible bind the government finds itself in.

The central truth here is the victims of sexual abuse have been repeatedly and profoundly let down by multiple agencies of the state, over years, even decades.

Little wonder establishing, let alone maintaining trust is incredibly difficult.

"Upset and vulnerable people hit out when they are in pain, and that is entirely understandable," is how one senior government figure put it to me.

The panel members, I am told, are of a range of views and instincts – on their willingness or not to speak out, on their views on those who chose to do so or not, on who should chair the inquiry, how it should be run and on Jess Phillips.

Merely setting up this inquiry, let alone conducting it and then implementing the conclusions it comes to and the recommendations it makes, is already proving to be a huge headache.

Defence Secretary John Healey has a message for Russian President Vladimir Putin: "We're hunting your submarines."

There has been a "30% rise in Russian vessels threatening UK waters", he says.

This, according to Healey, is evidence of increased "Russian aggression right across the board" which he says is impacting Europe, not just Ukraine.

The Ministry of Defence says Russian submarine activity in the North Atlantic is now back to the same levels as the Cold War era.

The RAF and Royal Navy have been stepping up their watch of the North Atlantic, where Russian submarines are most active. The RAF is flying missions most days, sometimes around the clock and often reinforced by other Nato allies.

BBC News joined the defence secretary on a flight on one of the RAF's new P-8 aircraft - the first media to be allowed to observe an active mission.

Members of the nine-strong crew face banks of monitors – showing them what's happening both on and under the surface of the water.

It is, in effect, a high-tech spy plane, which is one reason why we're not allowed to film or photograph any of the screens.

From the outside the P-8 may look like an airliner, just painted grey and with fewer windows. It is in fact the airframe of a Boeing 737, but inside it's fitted out with sophisticated cameras and sensors and listening devices.

Observing the crews at work, Healey tells me: "Russia is challenging us; it's testing us; it's watching us. But these planes allow us to say to Putin – we're watching you; we're hunting your subs."

At first, the crew track a number of surface vessels, using the aircraft's cameras to look for any suspicious equipment or activity. At times they're flying just a few hundred metres above the waves.

Last year, with help of the Royal Navy, an RAF P-8 monitored the Russian spy ship, Yantar, which was reported to be hovering over undersea cables in the Irish Sea.

Western nations are increasingly concerned that Russia might try to sever critical undersea cables as part of its hybrid warfare – causing chaos and disruption to internet communications.

Later, they switch the mission to hunt for submarines. At the back of the aircraft are stored 129 active and passive sonar buoys which can detect underwater sounds.

There's a loud pop as the buoys are fired automatically. One of the cameras on board shows them falling by parachute into the water. There's no sign of the torpedoes the aircraft can carry to destroy submarines.

One of the crew admits that finding a submarine is not always that easy.

But they know the signature sound of Russian submarines and are helped by a wider network of underwater sensors. In August the RAF, working with US and Norwegian P-8s, tracked a Russian submarine shadowing an American aircraft carrier, the USS Gerald R Ford, on exercise in the North Atlantic.

'Time to get more aware'

It is a team sport – and the team is about to get even bigger, as Germany has ordered eight of its own P-8 aircraft. For this flight, Healey has been joined by his German counterpart, Boris Pistorius.

German military personnel have already been training alongside their UK colleagues and for part of this mission there's a German navy pilot in the cockpit.

Germany plans to frequently fly its own maritime patrols from RAF Lossiemouth - Pistorius tells me why.

"The North Atlantic is crucial, and it's threatened by Russian nuclear submarines," he says. "Therefore, we need to know what's going on here in the deep sea."

The German defence minister's presence underlines the deepening defence relationship with the UK. There's much closer co-operation following the signing of the Trinity House Agreement on defence last year.

Germany is already investing in the UK to build new tanks and armoured vehicles for the British Army. On this visit, Pistorius announced that Germany would be buying UK-made Sting Ray torpedoes for its P-8 aircraft. The two countries are also promising to work together on cyber-security.

Pistorius and Healey have already been leading Europe's efforts to supply weapons to Ukraine. Now they're turning their attention closer to home.

Pistorius says every day there is evidence of Russia's hybrid warfare – "fake news, disinformation, hybrid attacks, the threat to undersea infrastructure".

He says: "It's time to get more aware of what's going on."

Planned airport expansion that would result in hundreds of thousands of extra flights a year could risk the government's own net zero goals, a committee of MPs has found.

The report from the cross-party Environmental Audit Committee said the government had also "not demonstrated" that the negative climate impact of expansion would be outweighed by the economic growth created.

The government has approved several airport expansion schemes, most recently a third runway at London Heathrow and a second runway at Gatwick.

The Department for Transport said airport expansion plans would "only go ahead if it aligns with our legal obligations on climate change".

Ministers are expected to announce which of two rival proposals is preferred for the expansion of Heathrow within weeks.

The Gatwick decision could lead to an extra 100,000 flights per year. If Heathrow gets permission to build a third runway, that could mean another 276,000 flights a year, with approval for an expansion of Luton airport also potentially adding tens of thousands.

The Environmental Audit Committee said the only prospect of meeting net zero would be if airport expansion was "accompanied by a serious strategic approach to increasing the pace of decarbonising aviation".

However, its chair Toby Perkin noted that technological solutions - such as sustainable aviation fuel - were not yet being used on a commercial scale.

The report said the plans were likely to provide some economic growth, but how much was unclear, and the government had not provided supporting evidence.

The UK has legally binding targets to reduce its levels of planet-warming emissions, and contribute to the global goal of preventing average temperatures rising by more than 1.5C by 2050.

Above this temperature level, scientists anticipate significant impacts from global sea level rise, more extreme weather and impacts on agriculture.

To prevent temperatures increasing there is a limit to the amount of greenhouse gases, such as CO2, that the world can release, and the UK has set out its own share of these – known as carbon budgets.

On Wednesday, the Transport Secretary Heidi Alexander told Parliament that Heathrow's expansion plans "must align with our legal, environmental and climate commitments".

A spokesperson for the DfT said: "We have been clear that airport expansion will only go ahead if it aligns with our legal obligations on climate change, including net zero, and we will be seeking advice from the independent Climate Change Committee to inform the ANPS review."

But Dr Alex Chapman, a senior researcher at New Economics Foundation (a think tank focused on environmental and social policies) who gave evidence to the environmental audit committee, said the inquiry was a "damning assessment of this government's airport expansion agenda".

"This government is unable to produce evidence that supports their central claim: that growing our airports will grow our economy.

"Had they done their research they would have found that demand for business air travel is collapsing and we're flying ever more tourists to spend money outside the country than we are flying in."

Just 37 years old, Chen Zhi is accused of being "the mastermind behind a sprawling cyber-fraud empire… a criminal enterprise built on human suffering".

With his wispy goatee beard and baby-faced features, he looks even younger than he is. He has certainly become very wealthy, very quickly.

Last week the US Department of Justice charged him with running scam compounds in Cambodia that stole billions in cryptocurrency from victims all over the world. The US Treasury Department has confiscated more than $14bn (£10.5bn) worth of bitcoin that it says is linked to him - it said this was the largest ever crypto-currency seizure.

His own company, the Cambodian Prince Group, describes him on its website as "a respected entrepreneur and renowned philanthropist" whose "vision and leadership have transformed Prince Group into a leading business group in Cambodia that adheres to international standards". The BBC has contacted the Prince Group for comment.

So, how much do we know about Chen Zhi, the mysterious figure allegedly running a scam empire?

A startling rise

Brought up in Fujian province in south-eastern China, he started with a small, and apparently not very successful internet gaming company, and moved to Cambodia in either late 2010 or 2011, where he began working in the then-booming real estate sector.

His arrival coincided with the start of a speculative property boom in Cambodia. It was fuelled by the availability of large tracts of land expropriated by powerful, politically-connected figures and by a flood of Chinese capital.

Some of it was pouring in on the tail end of Xi Jinping's Belt and Road Initiative to export Chinese-made infrastructure, and some of it was from individual Chinese investors seeking more affordable alternatives to China's overheated property market. The number of Chinese tourists visiting Cambodia was also rising fast.

The skyline of the capital Phnom Penh changed dramatically. The characterful, low-rise cityscape of mustard-coloured French colonial mansions was transformed into another Asian high-rise forest of glass and steel towers.

The transformation of Sihanoukville, a once quiet little seaside resort, was even more extreme. It was not just Chinese holidaymakers and property speculators heading there, but also gamblers - gambling is illegal in China.

New casinos sprang up, alongside gaudy, luxury hotels and apartment blocks. There was plenty of money to be made.

Even so, Chen Zhi's trajectory was startling.

In 2014 he became a Cambodian citizen, giving up his Chinese nationality. This enabled him to buy land in his own name, but required a minimum investment or donation to the government of $250,000.

It was never clear where Chen Zhi's money came from. When applying for a bank account on the Isle of Man in 2019 he listed an unnamed uncle who he said had given him $2m to start his first property company in 2011, but no evidence for this was ever provided.

Chen Zhi founded the Prince Group in 2015, focused on property development, when he was still only 27 years old.

He got a commercial banking licence in 2018 to establish Prince Bank. The same year he obtained a Cypriot passport, in return for a minimum investment there of $2.5m, giving him easy access to the European Union. He later acquired Vanuatu citizenship as well.

He started Cambodia's third airline, and in 2020 obtained a certificate to operate a fourth. There were luxury malls in Phnom Penh built by the Prince property arm, five-star hotels in Sihanoukville, and an ambitious scheme to construct a $16bn "eco-city" called "Bay of Lights" there.

In 2020 Chen Zhi was awarded the highest title bestowed by Cambodia's king, that of "Neak Oknha", which requires a donation of at least $500,000 to the government.

He had already been made an official adviser to Interior Minister Sar Kheng since 2017, was a business partner with his son Sar Sokha, and an official adviser to Cambodia's most powerful man Hun Sen, and later his son Hun Manet after he succeeded his father as prime minister in 2023.

Chen Zhi was lauded in the local media as a philanthropist, who had funded scholarships for low-income students and donated substantially to help Cambodia deal with the Covid pandemic.

Yet he remained an enigmatic figure, staying out of the limelight, making few public statements.

"Everyone I've spoken to who's worked with him directly, been in the room with him, they all describe him as very courteous, very calm, very measured," says Jack Adamovic Davies, a journalist who did a three year-long investigation of Chen Zhi which was published by Radio Free Asia last year.

"I think not being the kind of flamboyant person that people will write tabloid-y things about was smart. Even those who no longer want to be associated with him are still impressed by his quiet charisma, his gravitas."

But where was all this wealth and power coming from?

'A litany of transnational crimes'

In 2019 the property bubble burst in Sihanoukville. The online gambling business had attracted Chinese criminal syndicates, who then began violent turf wars with each other. Tourists were scared off.

Under pressure from China, then-prime minister Hun Sen banned online gambling in August that year. Around 450,000 Chinese left the city as its main business collapsed. Many of Prince Group's residential blocks were left empty.

Yet Chen Zhi continued to expand his business interests and spend freely.

According to the UK authorities, in 2019 he bought a £12m mansion in north London and a £95m office block in the city's financial district. The US says he and his associates bought properties in New York, private jets and superyachts, and a Picasso painting.

And, they allege, Chen Zhi's wealth came from the most profitable business in Asia today, online fraud, and the human trafficking and money laundering that go with it.

The US and UK have imposed sanctions on 128 companies linked to Chen Zhi and Prince Group, and on 17 individuals from seven different nationalities who they allege helped run his scam empire. Assets linked to Chen Zhi in the US and UK have been frozen.

The sanctions announcement describes an elaborate web of shell companies and cryptocurrency wallets through which money was moved to conceal its origins.

It says: "Prince Group Transnational Crime Organisation profits from a litany of transnational crimes including sextortion - a type of fraud involving the solicitation for eventual blackmail of sexually explicit materials, often from minors - money laundering, various frauds and rackets, corruption, illegal online gambling, and the industrial-scale trafficking, torture, and extortion of enslaved workers in furtherance of the operation of at least 10 scam compounds in Cambodia."

The 'scam empire'

China too had been quietly investigating the Prince Group since at least 2020. There have been a number of court cases accusing the company of running online fraud schemes.

The Beijing Municipal Public Security Bureau has established a task force "to investigate the "Prince Group, a major transnational online gambling syndicate based in Cambodia".

At its heart, the US and UK allege, were businesses like Golden Fortune Science and Technology Park, a compound built by the Prince Group in Chrey Thom, close to the Vietnamese border.

In the past the Prince Group has denied any involvement in scams, and said it no longer has any connection to Golden Fortune, but the US and UK investigation argues that there is still a clear business link between them.

Mr Adamovic Davies interviewed a number of people living and working near Golden Fortune for his investigation into Chen Zhi. They described brutal beatings of the mainly Chinese, Vietnamese and Malaysians who tried to escape from the compound, where they were forced to run online scams.

"I think it's the sheer scale of his operations which really makes Chen Zhi stand out," he says, adding that it is shocking the Prince Group was able to build a "global footprint" without raising alarm bells given the serious criminal charges it now faces.

"What should be uncomfortable for a lot of people is that Chen Zhi should never have been able to acquire all these assets, in Singapore, London or the US. Lawyers, accountants, real estate agents, bankers, all should have been looking at this group and saying, hang on, this doesn't add up. And they didn't."

Today, after all the publicity generated by the US and UK sanctions, businesses are rushing to dissociate themselves from the Prince Group.

The Cambodian Central Bank has had to issue a statement to nervous depositors assuring them they will be able to withdraw their funds from Prince Bank. The South Korean authorities have frozen $64m of its deposits held by Korean banks.

The Singapore and Thai governments are promising investigations into Prince subsidiaries in their jurisdictions - of the 18 individuals targeted by the US and UK, three are Singaporeans.

Cambodia's government has said little, apart from urging the US and UK authorities to be sure they have sufficient evidence for their allegations.

But it will be difficult for Cambodia's ruling elite to distance themselves from Chen Zhi, after being so close to him for so long. Cambodia was already facing growing pressure over its tolerance of scam businesses, which some estimate may account for around half of the entire economy.

And what of Chen Zhi himself?

Nothing has been heard or seen of him since the sanctions were announced last week. The enigmatic tycoon, once among the most powerful figures in Cambodia, appears to have vanished.

US authorities announced several high-profile arrests on Thursday, including of a star player and a coach in the National Basketball Association (NBA), for alleged illegal sports betting.

Among those in custody are Portland Trail Blazers coach Chauncey Billups and Miami Heat player Terry Rozier, both of whom were reportedly arrested after their teams' games on Wednesday.

The arrests are part of a sweeping investigation into illegal gambling that produced two indictments, the FBI said — one into players who are allegedly faking injuries to influence betting odds, and another involving an illegal poker ring tied to organised crime.

Here is what we know about the cases.

What are the allegations?

FBI Director Kash Patel described the allegations to reporters as "mind-boggling".

They include indictments in two major cases, officials said, both involving fraud.

The first case is called "operation nothing but bet," in which players and associates allegedly used insider information to manipulate wagers on major sports betting platforms.

• FOLLOW LIVE: NBA stars and mafia among more than 30 arrested in illegal gambling crackdown

In some cases, players altered their performance or took themselves out of games to ensure those bets were paid out, according to New York City police commissioner Jessica Tisch. Those bets amounted to tens of thousands of dollars in profits.

The second case is more complex in nature, officials said, and involved four of the five major crime families in New York as well as professional athletes.

The accused in that case are alleged to have participated in a scheme to rig illegal poker games and steal millions of dollars.

They did so using "very sophisticated" technology including off-the-shelf shuffling machines, special contact lenses and eye glasses to read pre-marked cards, according to authorities. They also used an X-ray table that could read cards that were face down.

The victims were allegedly lured to play in these games with former professional athletes, who acted as "face cards" in the scheme. The victims were unaware that everyone, including the dealer and the other players, were in on the scam.

Authorities said they began probing these poker games in 2019, spanning multiple locations including the Hamptons, Las Vegas, Miami and Manhattan.

The accused allegedly laundered profits via bank wires and crypto currencies.

They are also alleged to have committed acts of violence, including a robbery at gunpoint and extortion against victims.

Both schemes amounted to tens of millions of dollars in theft and robbery across several years and 11 states, authorities said.

Which players have been arrested?

All in all, authorities say 34 defendants were indicted on charges related to the two fraud cases.

Six were charged in the first case of players allegedly faking injuries to influence betting odds, including Miami Heat player Rozier.

New York police commissioner Jessica Tisch said that in March 2023, Rozier, then playing for the Charlotte Hornets, allegedly let others close to him know that he planned to leave a game early with a supposed injury.

Members of the group then used that information to place fraudulent bets and cash out big, she said.

Commissioner Tisch said on Thursday after Rozier's arrest that his "career is already benched, not for injury but for integrity".

Former NBA player Damon Jones was also arrested. He is said to have been involved in two games that were allegedly part of the scheme, when the Los Angeles Lakers met the Milwaukee Bucks in February 2023, and a January 2024 game between the Lakers and Oklahoma City Thunder.

Authorities identified a total of seven NBA games between February 2023 and March 2024 that were part of the case:

• 9 February, 2023 – Los Angeles Lakers v Milwaukee Bucks

• 23 March, 2023 – Charlotte Hornets v New Orleans Pelicans

• 24 March, 2023 – Portland Trail Blazers v Chicago Bulls

• 6 April, 2023 – Orlando Magic v Cleveland Cavaliers

• 15 January, 2024 – Los Angeles Lakers v Oklahoma City Thunder

• 26 January, 2024 – Toronto Raptors v Los Angeles Clippers

• 20 March, 2024 – Toronto Raptors v Sacramento Kings

The second case related to illegal poker games involved a total of 31 defendants, including Portland Trail Blazers coach Billups, who was inducted into the basketball Hall of Fame last year.

Authorities said three of the accused were charged in both cases.

Thirteen members and associates of the Bonanon, Genovese and Gambino crime families in New York were also indicted in the illegal poker case.

The charges include robbery, extortion, wire fraud, bank fraud and illegal gambling.

The defendants have been arrested and are due to appear in court later on Thursday, authorities said. They are expected to be arraigned in a Brooklyn, New York, court at a later date.

What has the NBA said about the allegations?

In a statement on Thursday, the NBA said it is in the process of reviewing the federal indictments that were announced and that it is co-operating with authorities.

The league added that Rozier and Billups are being placed "on immediate leave" from their teams.

"We take these allegations with the utmost seriousness, and the integrity of our game remains our top priority," the statement said.

Who are New York's notorious 'Five Families'?

Authorities said the alleged scheme involved four of the five well-known crime families of New York.

The Five Families - the Bonanno, Colombo, Gambino, Genovese and Lucchese - have ruled the city's Italian American mafia since 1931.

Major mob takedowns reduced the prevalence of mafia activity in the 1990s, aided by the Racketeer Influenced and Corrupt Organizations (RICO) Act and then-New York mayor Rudy Giuliani.

But, as Thursday's indictments show, the mafia has not entirely gone away.

The Five Families are part of the larger American-Sicilian mafia operation known as La Cosa Nostra, which translates to "this thing of ours", and the members often work closely with their counterparts in Sicily.

On the Italian side, the gangsters consider New York City to be a "gym" where their members go to be toughened up, criminology professor and modern organised crime expert Anna Sergi, previously told BBC.