British-made drones reportedly used in attacks deep inside Russia have triggered a new confrontation between Moscow and London, while Prime Minister Andy Burnham says Britain will continue supporting Ukraine “100%.”

LONDON / MOSCOW / KYIV — Russia has issued one of its sharpest recent warnings to Britain over military assistance to Ukraine, threatening unspecified “consequences” after reports that British-manufactured drones have been used in Ukrainian long-range attacks against targets inside Russian territory.

The Russian Embassy in London accused Britain of deliberately deepening its involvement in the war and warned that greater British support for Ukraine would carry a higher cost. The warning followed reporting by The Times that Ukrainian forces had begun using drones manufactured by two British companies in their expanding campaign against targets far beyond the front line.

Britain has rejected the pressure. Prime Minister Andy Burnham said Tuesday that London would continue to support Ukraine “100%” and would not change course because of Moscow’s threats.

“We are not fair-weather friends,” Burnham said, declaring that Britain would remain with Ukraine “in its hour of need.” He said successive British governments had supported Kyiv’s right to defend itself and that the policy would continue under his leadership.

The exchange comes at a particularly volatile moment in the war, as Ukraine accelerates an unprecedented campaign of long-range drone attacks against Russian energy, industrial and logistics infrastructure while Russia continues large-scale missile and drone strikes across Ukraine.

British drones move into the spotlight

The latest dispute began after The Times reported that British-built unmanned aircraft had been used by Ukrainian forces for deep strikes inside Russia.

One system identified in subsequent British reporting is the Nyan, a jet-powered one-way attack drone developed by Callen-Lenz, which is part of BAE Systems. British defence sources cited by The Guardian indicated that UK-made drones had been involved in Ukrainian operations against Russian targets.

Britain’s Ministry of Defence has not publicly confirmed the locations or missions in which individual UK-manufactured drones have been used. Responding to Moscow’s warning, the ministry instead reiterated that Britain remained committed to supplying Ukraine with the equipment it needs to defend itself against Russia’s invasion.

That distinction is important. Reports of British-made drones operating inside Russia have been supported by British media and defence sources, but London has not officially published operational details confirming individual strikes.

Russia nevertheless portrayed the development as evidence that Britain was moving deeper into the conflict.

Moscow has made similar accusations before. In May 2024, after then-Foreign Secretary David Cameron said Ukraine had the right to decide how to use British-supplied weapons, Russia warned that British military facilities and equipment associated with Ukraine could become targets in retaliation for strikes carried out with UK weapons.

The latest warning is therefore part of a longer pattern of Russian efforts to deter Western governments from supplying Kyiv with weapons capable of reaching targets inside Russia.

Britain dramatically expands its drone support

What has changed is the scale of the technology being supplied.

In April, the British Ministry of Defence announced its largest-ever drone package for Ukraine, saying it would deliver at least 120,000 drones during 2026. The package includes thousands of long-range strike drones along with intelligence, reconnaissance, logistics and maritime systems. Deliveries had already begun when the announcement was made.

Two months later, Britain announced another major package: 150,000 Ukrainian-produced drones by the end of 2026, accompanied by more than 350 air-defence missiles and radar systems. The £752 million program is financed through Britain’s contribution to the G7-backed Extraordinary Revenue Acceleration loan, supported by proceeds generated from immobilised Russian sovereign assets.

Britain has also been working with Ukraine on increasingly sophisticated strike technology.

Under Project Brakestop, British industry is developing lower-cost long-range weapons intended to offer some of the effects of cruise missiles at substantially lower cost. Britain has also provided Ukraine with Stone Cloak, a compact electronic-jamming system designed to interfere with Russian air-defence tracking of Ukrainian drones.

The UK government says thousands of Stone Cloak units have already been supplied and that intellectual property has been shared with Ukraine so the technology can be mass-produced there.

Britain has separately supplied Challenger 2 tanks, Storm Shadow cruise missiles, artillery, air-defence systems, anti-armour weapons and other military equipment since Russia launched its full-scale invasion in February 2022. The British government said in July that its total support for Ukraine since the invasion had reached £25 billion, including approximately £16 billion in military assistance.

Ukraine’s war is reaching deeper into Russia

The controversy over British drones has erupted as Ukraine demonstrates a rapidly growing ability to attack targets hundreds — and in some cases more than a thousand — kilometres from its borders.

During the early hours of Tuesday, Ukraine launched what Moscow Mayor Sergei Sobyanin described as 620 drones toward Moscow and the surrounding region. Russian authorities said 180 were destroyed over the Moscow region. At least three people, including a 10-year-old girl, were injured, while drone debris damaged a Wildberries warehouse and other facilities.

These figures are Russian official claims and cannot all be independently verified. They nevertheless illustrate the extraordinary scale of the aerial campaign now being reported.

The attack came only two days after another enormous Ukrainian drone operation. Russia’s Defence Ministry said 822 drones were intercepted across the country during attacks on August 16. Moscow-region Governor Andrei Vorobyov said an 83-year-old man was killed and several people were injured after a strike on the Wildberries logistics complex at Koledino, approximately 45 kilometres south of Moscow. Reuters footage confirmed a large plume of smoke over the facility.

The war that was once experienced by most Russians largely through television reports, military mobilisations and economic sanctions is therefore increasingly becoming physically visible in regions far from Ukraine.

Why is Ukraine attacking Wildberries?

One of the most striking features of Kyiv’s long-range campaign has been the repeated targeting of Wildberries, Russia’s largest online retailer.

Ukraine has attacked at least 20 Wildberries warehouses since July 18, according to Reuters reporting. Kyiv says the logistics network is used to move military or dual-use goods and argues that disrupting the company damages infrastructure supporting Russia’s war effort. Wildberries and the Kremlin dispute Ukraine’s allegations.

The attacks are also creating broader economic disruption. Wildberries processes millions of orders and serves huge numbers of Russian consumers and small businesses, meaning damage to its distribution network has consequences extending well beyond individual warehouses.

Ukraine has simultaneously continued attacking oil refineries, fuel installations, military-industrial facilities and Black Sea infrastructure in an effort to reduce Russia’s military capacity and pressure the economy sustaining the war.

The strategy appears designed not only to destroy physical assets but also to force Russia to disperse expensive air-defence systems across a vast territory.

How serious is Russia’s warning to Britain?

The Russian Embassy did not specify what it meant by “consequences,” leaving substantial room for interpretation.

A potentially more alarming assessment came Tuesday from Andrey Fedorov, a former Russian deputy foreign minister, who told BBC Radio 4 that some military figures in Moscow believe Russia could strike British-linked targets without provoking a full NATO military response.

Fedorov argued that uncertainty inside the alliance, particularly surrounding US policy, could lead NATO to choose consultations under Article 4 rather than collective defence under Article 5.

However, Fedorov is a former official, not a spokesman for the Kremlin, and his comments should not be interpreted as an announced Russian government decision or operational threat.

That distinction is critical.

NATO’s official position remains that an armed attack on one member is considered an attack on all under Article 5 of the North Atlantic Treaty. Each ally is then required to assist the country attacked, although the treaty leaves individual members flexibility over the form that assistance takes.

Article 4 is different. It allows NATO members to request consultations whenever their territorial integrity, political independence or security is threatened. It does not replace Article 5, nor is invoking Article 4 a required preliminary step before collective defence measures are considered.

A deliberate Russian military attack on British territory would therefore represent a dramatically different level of escalation from Moscow’s current diplomatic warnings.

Hybrid retaliation may be the greater immediate concern

Rather than a direct conventional strike on Britain, Western security officials have long considered cyber operations, sabotage, intelligence activities, disinformation, electronic interference and covert actions more plausible tools through which Moscow could seek to impose costs on countries supporting Ukraine.

NATO itself recognises that sufficiently serious cyber or hybrid attacks can, depending on their scale and effects, potentially qualify as an “armed attack” for Article 5 purposes, with any judgment made on a case-by-case basis.

Russia has previously issued warnings hinting that companies or facilities participating in Western drone production could become targets. In April, Moscow publicly criticised European drone-manufacturing support for Ukraine and identified sites in several countries, while former Russian president Dmitry Medvedev suggested such facilities could eventually be regarded as military targets.

That rhetoric has added to European concerns about escalation below the threshold of conventional war.

London shows no sign of retreat

For Britain, however, the latest Russian warning appears unlikely to produce a policy shift.

Burnham had already reinforced Britain’s commitment during Ukrainian President Volodymyr Zelenskyy’s visit to the UK in late July, when he said Britain would continue standing “shoulder to shoulder” with Ukraine. His government says it intends to maintain £3 billion in annual support for Kyiv for as long as necessary.

Tuesday’s response was consistent with that policy: British officials portrayed their military assistance as support for Ukraine’s self-defence rather than participation in Russia’s war.

The dispute nevertheless illustrates how quickly the strategic boundaries of the conflict are changing.

Western governments initially hesitated over sending tanks, advanced missiles and long-range weapons to Ukraine. Many of those restrictions have gradually eased, while Ukraine’s own defence industry has simultaneously developed drones capable of reaching increasingly distant Russian targets.

The question is therefore no longer simply whether Ukraine can strike inside Russia. It demonstrably can.

The more consequential question is how Russia chooses to respond as Western technology becomes increasingly integrated into Ukraine’s long-range strike capability — and whether Moscow’s repeated warnings remain primarily instruments of deterrence or eventually translate into action against Ukraine’s NATO supporters.