Harriet PriceA Russian Su-35 fighter jet made six aggressive passes in front of a RAF RC-135W Rivet Joint surveillance aircraft over the Baltic Sea on 20 May 2026, according to the UK Ministry of Defence. On one of those passes, the Russian aircraft closed to within six metres of the Rivet Joint's nose — close enough to trigger the plane's emergency systems and disable its autopilot. The UK described it as the most dangerous Russian action against a British Rivet Joint since 2022.
The aircraft was in international airspace, conducting a routine intelligence-gathering patrol as part of NATO's persistent presence across the Baltic region. It was unarmed. The crew completed their planned mission despite the intercepts.
The incident raises immediate questions about what international law says when a military aircraft is threatened in international airspace — and what legal and diplomatic options the UK has in response.
What Actually Happened Over the Baltic
The RAF operates three RC-135W Rivet Joint aircraft, described by the RAF as capable of surveying "elements of the electromagnetic spectrum" using specialist Weapons System Officers and Operators. These aircraft conduct long-duration racetrack patterns across the Baltic Sea, gathering signals intelligence in coordination with US and NATO allies.
Flight tracking data released after the incident confirmed the Rivet Joint was in international airspace — beyond the 12-nautical-mile territorial limit of any state — at the time of the intercepts. A Su-27 conducted six passes in front of the British aircraft, and a separate Su-35 closed to the near-collision distance.
The distinction between international and territorial airspace matters enormously in the legal analysis of what follows.
What International Airspace Law Says
Airspace above the high seas is international airspace, governed primarily by the Chicago Convention on International Civil Aviation (1944) and customary international law. In international airspace, no state has sovereignty. All states have equal freedom to operate aircraft, including military aircraft, consistent with general principles of international law.
The key legal norm applicable here is the duty to exercise "due regard" — a standard recognised under customary international law and reflected in the United Nations Convention on the Law of the Sea (UNCLOS). Military aircraft in international airspace must exercise due regard for the safety of other aircraft. When a state actor deliberately manoeuvres a fighter jet within six metres of another state's aircraft — especially one it knows to be unarmed and in a non-threatening position — it is arguable that Russia has breached this standard.
The International Civil Aviation Organization (ICAO), the UN body that governs civil aviation safety, maintains established procedures for military interceptions of civil aircraft and has issued guidance on safe intercept distances. While ICAO's direct mandate is civil aviation, its norms on minimum safe distances are referenced in broader international aviation law discussions. For the official standards framework, see the UK Ministry of Defence.
The UK's Legal and Diplomatic Options
When a state actor endangers UK military aircraft in international airspace, the response options operate at multiple levels.
Diplomatic protest is the most immediate avenue. The UK can lodge a formal protest with Moscow through its embassy, and summon the Russian Ambassador to the Foreign, Commonwealth and Development Office in London. The protest creates a formal record that the UK considers Russia's conduct a violation of international norms — important for future legal arguments.
ICAO complaint — If the intercept endangered civil as well as military aircraft (which is plausible given the busy commercial corridors over the Baltic), the UK can file a formal complaint with ICAO under Article 54 of the Chicago Convention. ICAO's Council can investigate and issue findings, though it has no enforcement power.
NATO invocation — The incident occurred in a NATO-monitored airspace and during a NATO patrol mission. If the UK concludes that Russia's conduct meets the threshold of armed attack, Article 5 of the North Atlantic Treaty could theoretically be invoked, though the UK has not suggested this is under consideration.
State responsibility — Under customary international law as codified in the Articles on the Responsibility of States for Internationally Wrongful Acts (ARSIWA), a state that breaches an international obligation is responsible for that breach and obligated to make reparations. For a dangerous intercept over the Baltic, the UK could in principle assert a claim for reparations before an international tribunal — though in practice state-to-state disputes of this kind rarely proceed to formal adjudication.
Implications for UK Businesses and Individuals with Russia Exposure
Legal advisers working with UK companies and individuals who have financial or operational ties to Russia have noted that incidents like the Rivet Joint intercept consistently precede a tightening of the UK's Russia sanctions regime. The pattern since 2022 has been consistent: a major military provocation is followed within weeks by new or expanded sanctions designations by the Office of Financial Sanctions Implementation (OFSI).
If you have outstanding commercial contracts, joint ventures, or financial instruments connected to Russian entities — including assets held in Russia or through Russian intermediaries — the current trajectory suggests reviewing your exposure is urgent. The UK's Russia sanctions package is already among the most extensive in the world.
The shadow fleet of tankers carrying Russian oil has been a flashpoint for UK sanctions enforcement. For an overview of how shadow fleet seizures have created legal exposure for UK businesses, see our coverage of Russian warship sanctions and what the shadow fleet means for UK companies.
Why a Legal Expert Can Help Right Now
Whether you are a business assessing Russia sanctions exposure, a lawyer advising on state responsibility, or an individual seeking to understand your legal position after operating in or near conflict-adjacent airspace, the legal landscape is complex and moving fast.
An ExpertZoom legal expert can provide a same-day consultation on your specific exposure — whether that is sanctions compliance, contractual obligations with Russian counterparties, or asset recovery in the current geopolitical environment.
Disclaimer: This article provides general legal information only and does not constitute legal advice. Consult a qualified solicitor for advice specific to your circumstances.
