The UN's top nuclear watchdog will personally lead inspections of Iranian military sites. A condition of the fragile war deal. British diplomats, still nursing bruises from the Iraq WMD debacle, are demanding 'absolute, unimpeachable verification.'
Sources in the Foreign Office tell me the Rafael Grossi visit is a 'make or break' moment. The deal, hammered out in Vienna, hinges on Iran proving its nuclear programme is peaceful. The ayatollahs have agreed to unprecedented access. But Westminster is holding its breath. Too many past promises have evaporated.
'The intelligence community is sceptical,' admits a senior Whitehall source. 'They remember the enriched uranium traces found at the Marivan site in 2023. The cover stories. The slow-walking of inspectors.' Grossi, a seasoned Argentinian diplomat, carries the weight of the IAEA's credibility. If he is denied full access, the deal collapses. And with it, hopes of de-escalation in the Middle East.
Labour backbenchers are restless. A group of 30 MPs has tabled an early day motion calling for a Commons vote on any final agreement. 'We cannot repeat the mistake of Libya,' one tells me. 'Gaddafi gave up his programme, then got bombed. Iran is watching.' The government's line is firm: verification must be 'robust, continuous, and intrusive.'
But the real game is in Tehran. Hardliners in the Revolutionary Guards see the inspections as a humiliation. They are already leaking stories of 'spies' among the IAEA teams. Meanwhile, the Iranian president, facing street protests over the economy, needs the sanctions relief this deal promises. A delicate balancing act.
One diplomat quipped: 'It's like watching a tightrope walker with vertigo.' Grossi's itinerary is being kept under wraps. But I hear he will visit the Natanz enrichment facility, the Fordow underground site, and a military complex near Isfahan. The key question: will he get to the Parchin base, site of suspected high-explosive tests? The answer determines whether this deal lives or dies.
Downing Street is cautious. 'We are not popping champagne corks yet,' a Number 10 aide says. The PM's political position is fragile. A leak from a senior minister suggests he warned the cabinet that 'failure is an option.' In private, he is more blunt: 'If Grossi is blocked, we go back to the UN Security Council. And that means another round of crippling sanctions.'
The clock is ticking. Grossi lands in Tehran tomorrow. British diplomats will be hovering, collars turned up, watching his every move. Trust, but verify. That is the mantra. And in this game, verification is everything.
One thing is certain: the backbench barons in the 1922 Committee will be watching closely. Any whiff of a cover-up, and the PM's inbox will fill with letters demanding a debate. This story is far from over.
