British intelligence has completed a classified assessment of the new Iran nuclear agreement, and the picture it paints is grimmer than any previous accord. Sources inside Whitehall confirm the deal allows Tehran to retain a larger uranium enrichment capacity than the 2015 Joint Comprehensive Plan of Action (JCPOA) ever permitted. But the real shocker is the money trail.
Under the new framework, sanctions relief is swifter and broader. The Treasury estimates Iran could access up to $50 billion in frozen assets within the first year. That is cash the regime will be free to channel into its ballistic missile programme and proxy forces across the Middle East. Past deals tried to slow the flow, attaching conditions to every tranche. This one appears to have no such brakes.
Then there is the question of weapons. The conventional arms embargo on Iran expires under the terms of this deal, opening the door for Tehran to buy and sell advanced military hardware. Russian Su-35 fighter jets and Chinese anti-ship missiles are at the top of the shopping list, according to defence intelligence. The previous agreement kept that embargo in place for five more years. This one does not.
Naval capabilities are another leap. Intelligence indicates Iran is negotiating the purchase of three Kilo-class submarines from Russia. Combined with the armed drones and precision-guided munitions already flowing from Tehran to its proxies, the regional balance of power is shifting. The Royal Navy's Gulf patrols just got a lot more dangerous.
But perhaps the most troubling aspect is the inspection regime. The new deal weakens the International Atomic Energy Agency's access to undeclared sites. Under the JCPOA, inspectors could demand entry to any suspicious location within 24 days. The new mechanisms allow Tehran to delay and dispute access for months. In the world of uranium enrichment, months are an eternity.
Former intelligence chiefs are calling this a catastrophe in the making. One former MI6 officer told me: 'We have traded a verifiable freeze for an unverifiable cap. It is not a cap at all. It is a floor from which they can sprint.'
The Foreign Office insists the deal is the only diplomatic option left. But internal memos leaked to this newspaper reveal deep unease within the Joint Intelligence Committee. The assessment concludes that the timeline for Iran achieving a nuclear weapon has been reduced from two years under the JCPOA to less than six months under this new pact.
Six months. That is not a pause. It is a head start.
