Russia expelled a British diplomat from Moscow on March 29, 2026, delivering a formal protest to Britain's Chargé d'affaires and accusing the individual of engaging in economic espionage against the Russian Federation, according to Russia's foreign ministry. The expulsion is the latest in a series of tit-for-tat diplomatic incidents between Moscow and London since Russia's full-scale invasion of Ukraine in February 2022, but it arrives at an unusually sensitive moment — with Russia simultaneously implicated in a separate and more serious intelligence-sharing operation with Iran.
Ukrainian President Volodymyr Zelenskyy said on March 29 that he is "100 percent confident" Russia is actively passing satellite intelligence to Iranian forces. Speaking during a press briefing in Riyadh, Zelenskyy stated that Russian reconnaissance satellites photographed a United States air base in Saudi Arabia on three separate occasions in the days immediately before Iran conducted a strike on that facility. The US Air Force base, which hosts US military assets supporting operations against Iran, was damaged in the attack. American officials have not publicly commented on Zelenskyy's claim, but the allegation — if confirmed — would represent a direct Russian role in enabling Iranian attacks on US forces.
The Russia-Iran intelligence-sharing allegation fits a documented pattern. The two countries formalized a comprehensive strategic partnership in January 2025, under which Iran supplied Russia with Shahed-136 and Shahed-238 drones — munitions that Russia has since fired at Ukraine in industrial quantities, including the 442-drone barrage launched overnight on March 29–30, 2026. In return, Russia has provided Iran with advanced air-defense technology, Su-35 fighter aircraft components, and, according to Zelenskyy, real-time satellite data. The partnership represents one of the most significant shifts in Middle Eastern and European security architecture since the Cold War.
The UK expelled a Russian intelligence officer from London in February 2026 — a move Russia said was the proximate cause of Sunday's counter-expulsion. Britain's Chargé d'affaires in Moscow, James Sheridan, was summoned to the Russian foreign ministry on March 29 and presented with a formal diplomatic protest before the expulsion order was delivered. The Foreign, Commonwealth & Development Office in London condemned the action as "unwarranted and retaliatory," adding that British intelligence cooperation with NATO partners would continue unaffected.
The diplomatic deterioration between Moscow and London comes as Zelenskyy pursues a parallel strategy of shoring up non-Western support. His Gulf state tour — three days in Qatar, Saudi Arabia, and the UAE ending March 29 — produced commitments on drone interception technology and, critically for Kyiv, a signal that Gulf sovereign wealth funds are willing to discuss post-war reconstruction financing for Ukraine. Zelenskyy's office said he secured "defence and reconstruction agreements" with each government, without specifying financial terms.
Russia's domestic economic position complicates its posture. The Bank of Russia set the official dollar-ruble rate at 81.2955 rubles for March 31 — the ruble has depreciated roughly 12 percent against the dollar since the beginning of the year, partly driven by oil revenue uncertainty as the Strait of Hormuz closure disrupts global supply benchmarks. Russia is itself an oil exporter, but its shadow fleet — the tankers it uses to move sanctioned crude — has faced increased US and British interdiction. A Russian oil tanker, the Anatoly Kolodkin, delivered approximately 730,000 barrels of crude to Cuba's Matanzas port on March 30, with Trump saying he had "no problem" with the shipment despite Cuba's existing US oil blockade — a statement that drew criticism from both parties in Congress.
What this means for you: The Russia-Iran intelligence-sharing allegation raises the stakes for the April 6 deadline significantly. If confirmed through US intelligence assessments, it would likely harden Congressional and NATO positions on any diplomatic agreement that does not include explicit provisions constraining Russia-Iran military cooperation. For investors tracking defense and cybersecurity equities, any evidence of Russian satellite data being used against US forces will accelerate existing Congressional pressure for increased military AI spending — watch for defense committee statements this week.