Sky News takes a look at the details of Mr Akbari’s life and the accusations made against him.
Government minister under reformist president
Mr Akbari served as Iran’s deputy defence minister when Ali Shamkhani was minister from 1997 to 2005 as part of reformist president Mohammad Khatami’s administration.
He was a close ally of Mr Shamkhani, who is currently the secretary of Iran’s Supreme National Security Council, since the Iran-Iraq war in the 1980s.
He also served in other security roles, including as an adviser to the Iranian navy, and led the implementation of UN resolution 598, which ended the Iran-Iraq war in 1988.
Mr Akbari had more recently run a private think tank.
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Life in Britain and his arrest
Mr Akbari moved to Britain after being briefly detained and released on bail in 2008, according to Iran’s state news agency IRNA.
He was arrested in 2019 and accused of espionage for MI6 concerning past nuclear talks between Iran and western nations, reports said.
Iran’s semi-official Tasnim news agency claimed Iranian intelligence unmasked him by feeding him false information and described him as “one of the most important infiltrators of the country’s sensitive and strategic centres”.
Iranian state media said a video broadcast on Thursday showed Mr Akbari played a key role in the assassination of Iran’s top nuclear scientist in 2020.
Mohsen Fakhrizadeh was killed in an attack, which authorities blamed on Israel.
In the video, Mr Akbari did not confess to being involved in the assassination, but said a British agent had asked for information about Mr Fakhrizadeh.
Iran’s judiciary claimed Mr Akbari received large sums of money, as well as his British citizenship and other help from London, for providing information to MI6.
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‘Drugged and tortured’: Alleged spy told of ordeal
Torture and false confessions
Mr Akbari denied the charge and claimed he was tortured and given mind-altering drugs and forced to confess to crimes he did not commit.
In an audio recording purportedly made by Mr Akbari and broadcast by BBC Persian, he said he had returned to Tehran following an invitation by a senior Iranian diplomat involved in Tehran’s nuclear talks with world powers.
His wife, Maryam Samadi, told BBC Persian he had been put in solitary confinement for 10 months before being moved to Tehran’s notorious Evin prison, where Iran has jailed other dual nationals.
In the recording, Mr Akbari said he had falsely confessed as a result of torture:
He said: “With more than 3,500 hours of torture, psychedelic drugs, and physiological and psychological pressure methods, they took away my will.
“They drove me to the brink of madness… and forced me to make false confessions by force of arms and death threats.
“They would tell me: ‘If you resist, we will send you to the dark cells of Evin prison where you’ll face an interrogator with a whip.'”
In the message, he also said he was accused of obtaining top-secret information from his former boss, Mr Shamkhani, “in exchange for a bottle of perfume and a shirt”. Mr Shamkhani remains in his role.
‘This will not stand unchallenged’
Prime Minister Rishi Sunak has said he was “appalled” by the execution, adding: “This was a callous and cowardly act, carried out by a barbaric regime with no respect for the human rights of their own people. My thoughts are with Alireza’s friends and family.”
Foreign Secretary James Cleverly said: “Iran has executed a British national.
“This barbaric act deserves condemnation in the strongest possible terms.
But that $1trn figure (or £761,910,000,000) – which is both one thousand billion and one million million – is almost impossible to imagine for most people.
Even so, we have drilled down into the numbers and examined what you can do with a trillion US dollars – and it turns out, quite a lot.
Show me the money
Laid end to end, a trillion one-dollar bills would cover a distance of approximately 156 billion metres.
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That could wrap around the equator 3,890 times, easily reach the sun from Earth (around 149.6 million km) or loop from Earth to the moon 405 times.
That many one-dollar notes could cover a massive area (roughly 10,339 km squared), meaning you could blanket nearly all of Lebanon or Jamaica in bills.
Spend it on sport
You could splash out on virtually all of the world’s major sporting leagues.
The clubs which make up the Premier League are relatively cheap ($30bn), and even when snapping up the UEFA Champions League clubs and the big five top divisions of Spain, Italy, Germany, and France, there’s still $858bn left in the kitty.
The four major US sports leagues for ice hockey, baseball, basketball, and American football (NFL, NBA, MLB and NHL) have a rough valuation of $544bn, according to Sportico.
But then add the IPL cricket league ($120bn) and F1 ($23.1bn) and Musk still has change from an estimated total spend of $829.7bn.
Image: Elon Musk is in the money if he hits targets set by Tesla’s shareholders. File pic: AP
Take over Tesla’s rivals
He could buy up the top 15 largest publicly traded automakers (excluding Tesla) by market capitalisation.
They would include firms like Japan’s Toyota ($275bn), Chinese automaker BYD ($120bn), and luxury brands like Ferrari ($81bn) and Mercedes-Benz ($62bn), as well as BMW ($52bn), Volkswagen ($50bn) and Ford ($48bn).
But there would still be a little change left over; the total bill would be an eye-watering $992bn.
Buy up San Diego
He could buy up every single residential property in San Diego County – valued at a total of $1trn. Seattle is just slightly out of reach at $1.1trn, according to recent data from real estate firm Zillow.
But if he wanted to buy big – there is always Tennessee. The total value of homes in the US state is estimated at $957bn. Or there is Maryland, which at $1.01trn could be bought if he can find a little more cash behind the sofa.
Sadly, he would struggle to scoop up London’s entire housing stock, which in February was valued at just under £2trn ($2.53trn), according to agents Savills.
Cities like New York ($4.6trn) and Los Angeles ($3.9trn) are also not within his budget, hosting America’s most expensive residential markets.
Do something charitable?
There is always the possibility Musk could follow in the footsteps of Microsoft founder Bill Gates, who intends to give away 99% of his vast fortune over the next 20 years.
He could give every single man, woman, and child in the US a share of his cash pile. They would receive approximately $2,917.32 (£2,223.29), based on a population estimate of 342.7 million.
Although it would be roughly $14,348.79 (£10,935.20) for every person (roughly 69.6 million) in the UK.
If he wanted to give the entire globe an early Christmas present, then based on the rough world population estimate of 8.2 billion, everyone would receive $121.80 (£92.87).
Pay off the credit card
With $1trn, he could instantly rewrite history and erase debt interest payments and the government debt from dozens of the world’s sovereign nations.
Or Musk could wipe out the debts of Singapore ($1trn) or South Korea ($0.99trn) in one go, according to figures from the International Monetary Fund’s latest World Economic Outlook (Oct 2025).
But when it comes to the biggest debt-laden countries, $1trn would not even touch the sides.
The US has $38.3trn of government debt (just over one third of the total global debt pile) while the UK has a modest $4.1trn.
Prince Harry has apologised to Canada for wearing a Los Angeles Dodgers cap while attending a World Series game against the Toronto Blue Jays.
The Duke of Sussex and his wife, Meghan, were pictured at the baseball game last Tuesday, which Toronto ultimately lost to the Dodgers in a seventh-game decider on Sunday.
The prince joked to Canadian broadcaster CTV that he wore the Dodgers merchandise “under duress”.
He said it felt like “the polite thing to do” after being invited to the dugout by the team’s owner.
“Firstly, I would like to apologise to Canada for wearing it,” he said.
“Secondly, I was under duress. There wasn’t much choice.”
“When you’re missing a lot of hair on top, and you’re sitting under floodlights, you’ll take any hat that’s available,” he joked.
“Game five, game six, game seven, I was Blue Jays throughout. Now that I’ve admitted that, it’s going to be pretty hard for me to return back to Los Angeles.”
The royal couple, who met in 2016 and married in 2018, moved to California in 2020 – after initially setting up home in Canada. They live in Montecito with their children Archie, six, and Lilibet, four.
Harry’s father, the King, is the head of state of Canada – a Commonwealth nation.
Meghan has previously shown her support for the Blue Jays, a nod to her former home city.
The former actress lived in Toronto while filming the legal drama Suits. She appeared in more than 100 episodes.
She and Harry also spent time together there during the early stages of their relationship.
James Watson, co-discoverer of the double-helix shape of DNA, has died at the age of 97.
James D. Watson shared a 1962 Nobel Prize with Francis Crick and Maurice Wilkins for discovering that deoxyribonucleic acid, or DNA.
Their co-discovery of the twisted-ladder structure of DNA in 1953 helped revolutionise medicine, crime-fighting, genealogy and ethics.
The discovery turned him into a legendary figure, but later in life he faced condemnation for offensive remarks, including saying black people are less intelligent than white people.
This breaking news story is being updated and more details will be published shortly.