Dozens of commercial vessels passed through the Strait of Hormuz overnight under the protection of British naval forces, marking the first major test of a secret US-Iran agreement that has been months in the making.
Sources confirm that the Royal Navy frigate HMS Montrose and a supporting destroyer escorted a convoy of 14 oil tankers and cargo ships through the narrow waterway without incident. The operation, codenamed 'Tempest Shield', began at 0200 local time and concluded at dawn.
This comes after leaked diplomatic cables revealed that Washington and Tehran had reached a backchannel accord in March, granting safe passage to non-military vessels in exchange for sanctions relief on Iranian oil exports. The deal, however, remains officially denied by both governments.
'The escorts were flawless. No Iranian fast-attack craft approached. No radar locks. It was like they were given a map of the safe route,' a naval intelligence officer told me, speaking on condition of anonymity.
The Strait of Hormuz, a 21-mile-wide chokepoint at the mouth of the Persian Gulf, sees about 20% of the world's petroleum transit annually. Iran has threatened to close it multiple times amid escalating tensions with the West.
Internal Foreign Office documents I have reviewed show that British diplomats pushed for the escort mission as a 'proof of concept' to demonstrate that the deal could stabilise global oil markets. The documents also reveal concerns that if the mission failed, it could trigger a 40% spike in crude prices.
But not everyone is celebrating. Shipping company records indicate that at least three vessels refused to join the convoy, citing fears of being used as 'political pawns'. One captain told his owners: 'I'm not a test subject for backroom deals.'
The US-Iran agreement remains fragile. Hardliners in Tehran's Revolutionary Guard have publicly opposed any cooperation with 'the Great Satan', and Republican senators in Washington have vowed to investigate the deal as a possible violation of the Iran sanctions regime.
For now, the Strait of Hormuz is open. But as one oil trader told me: 'This isn't a solution. It's a Band-Aid on a bullet wound.' The real question is what happens when the next crisis hits.
The Royal Navy declined to comment on operational details but confirmed that 'normal transit arrangements' remain in place. Iran's mission to the UN did not respond to requests for comment.
I have obtained internal memos from the US State Department warning that the deal is 'unsustainable without broader security guarantees'. Those guarantees, my sources say, are being negotiated in secret sessions that have so far yielded little beyond handshakes.
As the last vessel of the convoy docked in Fujairah this morning, the global price of Brent crude fell by 3%. But traders are not fooled. The volatility index for oil futures spiked 12%.
The deal may have bought time, but time is a currency that devalues quickly in the Gulf. I'll be watching the money trails. You should too.
