BBC diplomatic correspondent

Virtually a decade since world powers sealed a historic deal to restrict the Iranian nuclear programme, this can be a crunch second for Iran and the worldwide group.
The nation is now nearer than ever to with the ability to make a nuclear bomb.
And the settlement – designed to forestall Iran growing a nuclear weapon – expires later this yr.
“It is an actual fork within the highway second,” says Dr Sanam Vakil of the London-based suppose tank Chatham Home. “With out significant and profitable diplomacy we might see Iran weaponise or we might see a navy strike in opposition to the Islamic Republic.”
The deal, painstakingly negotiated over almost two years beneath Barack Obama’s presidency, imposed restrictions on Iran’s nuclear actions in return for aid from sanctions that crippled the nation’s financial system.
However after Donald Trump pulled out of the settlement in 2018 throughout his first presidency and reinstated US sanctions, Iran progressively stopped complying with its commitments.
It has accelerated its enrichment of uranium – used to make reactor gasoline but additionally probably nuclear bombs – to shut to weapons-grade.
Specialists say it might now take Iran lower than per week to counterpoint sufficient materials to make a single nuclear weapon.
Therefore a flurry of pressing diplomatic exercise by the US and the 5 different events to the deal – the UK, China, France, Germany and Russia.

A closed-door assembly of the UN Safety Council mentioned Iran’s nuclear programme on Wednesday.
And China is internet hosting talks with Iran and Russia on Friday searching for a “diplomatic” decision.
“Within the present state of affairs, we consider that every one events ought to keep calm and restraint to keep away from escalating the Iran nuclear state of affairs, and even strolling in the direction of confrontation and battle,” Chinese language international ministry spokeswoman Mao Ning mentioned this week.
On Wednesday, a letter from President Trump was delivered in Tehran by a senior diplomat from the United Arab Emirates.
The contents haven’t been made public.
However President Trump, after imposing new sanctions on Iran as a part of a “most stress” marketing campaign, final week issued a televised ultimatum to Iran: make a deal or else.
“I’ve written them a letter saying, ‘I hope you are going to negotiate as a result of if we’ve to go in militarily, it should be a horrible factor,'” he mentioned.
Iran’s Supreme Chief, Ayatollah Ali Khamenei, appeared to reject the thought of talks with a “bullying” US.
So too – publicly – has President Masoud Pezeshkian, who had beforehand supported a resurrection of the nuclear deal, in return for an finish to sanctions.
However the nation has been sending out blended messages.
“There are camps contained in the nation that favour negotiations,” says Dr Vakil. “And there are camps that see weaponisation as the most effective alternative for Iran to handle its safety.”
Belief within the Trump administration is in very brief provide.
“They’ve seen his erratic, very bullying method to [Ukraine’s President Volodymyr] Zelensky. And his outlandish proposals on Gaza and so they do not need to be put in that place,” Dr Vakil provides.
Iran hates the humiliation of getting a gun held to its head. However it’s presently weak – weakened militarily by Israeli air strikes final yr, that are believed to have destroyed a lot of the air defences defending its nuclear programme.
Israel has lengthy needed to take the services out.
Iranian authorities proceed to insist the nation’s nuclear programme is for peaceable functions.
However concern within the worldwide group is turning into more and more acute.

The Worldwide Atomic Power Company (IAEA) – tasked with monitoring the moribund nuclear deal – says it has seen Iran strengthen its nuclear capabilities at completely different services throughout the nation over the previous few years.
Its inventory of uranium enriched as much as 60% purity – near the 90% required for a weapon – is “rising very, very quick”, in line with IAEA Director Basic Rafael Grossi.
“The considerably elevated manufacturing and accumulation of excessive enriched uranium by Iran, the one non-nuclear weapon state to provide such nuclear materials, is of significant concern,” the IAEA says in its newest report.
However the nuclear watchdog is now not able to confirm precisely what Iran is doing, as a result of the authorities have eliminated IAEA surveillance gear.
Mr Grossi says diplomatic engagement with Iran – by way of no matter channels attainable – is now pressing and “indispensable”.
On 18 October, the events to the 2015 nuclear deal will lose the power to impose so-called “snap-back” UN sanctions on Iran for violating its phrases.
So the UK, France and Germany are wielding the specter of snap-back sanctions now, within the hope of exerting stress whereas they nonetheless can.
“We’re clear that we’ll take any diplomatic measures to forestall Iran buying a nuclear weapon, that features the usage of snapback, if wanted,” the UK’s deputy UN ambassador, James Kariuki, mentioned on Wednesday.
The stakes are excessive for Iran – and the world.
“If Tehran decides to construct a bomb, it might enrich sufficient uranium for a number of warheads inside weeks,” in line with Dr Alexander Bollfrass, who focuses on stopping nuclear proliferation for the Worldwide Institute for Strategic Research, one other London-based suppose tank.
Designing and assembling a deliverable weapon would, nonetheless, take a number of months to a yr or extra, he informed the BBC.
“Iran is nearer than ever to nuclear weapons functionality,” he says. “However it’s nonetheless not clear if it has determined to develop nuclear weapons or whether it is on the lookout for negotiation leverage.”