Russia has threatened Britain with “consequences” over reports that Ukrainian forces used drones manufactured by UK companies to carry out strikes inside Russia.

The Russian Embassy in London accused the UK of deliberately escalating the war by supporting Ukraine’s long-range strike campaign, saying Britain was seeking to “contain Russia and inflict maximum damage on it by proxy.” It warned that the deeper Britain becomes involved, “the higher the price it will pay.”

The threat followed news that Ukrainian forces had used two British-built drone systems to strike targets inside Russia for the first time. The Sunday Times, citing Ukrainian military sources, reported that the drones had been used against targets including oil refineries in Volgograd and Yaroslavl over the past six months.

Moscow warns Britain of “consequences”

The Russian Embassy said in a statement that the reported use of British-made drones “confirms that London is deliberately opting for an escalation of the Ukraine crisis.”

It warned that British actions would “inevitably carry consequences for which it will have to answer,” without specifying what form those consequences could take.

The warning comes as Ukraine has significantly expanded its long-range strike campaign against Russian military and energy targets. Kyiv has increasingly used large drone swarms to hit targets deep inside Russia, seeking to disrupt military production, logistics, and energy revenues while forcing Moscow to spread its air defenses across a much larger area.

Burnham says UK will continue backing Ukraine

UK Prime Minister Andy Burnham rejected Moscow’s warning, saying Britain would continue supporting Ukraine despite Russian threats, The Independent reported on Tuesday.

“This is the UK doing what it has long said it would do, which is to support Ukraine 100 per cent against this illegal war led by Vladimir Putin,” Burnham said during a visit to Wolverhampton.

“We are providing support so that Ukraine can defend itself,” he said, adding: “We are not fair weather friends. We will be there in Ukraine’s hour of need, and that won’t change.”

UK Work and Pensions Minister Lilian Greenwood similarly said Britain’s resolve to support Ukraine remained “completely steadfast” and that the country would continue providing the military equipment Kyiv needs.

The UK Ministry of Defence also said Russia should have “no doubt” about the government's resolve to oppose Russian aggression in Ukraine and against Britain and its allies.

British drones expand Ukraine’s deep-strike capabilities

According to The Sunday Times, one of the British systems used by Ukraine is the Nyan, a jet-powered one-way attack drone produced by BAE Systems subsidiary Callen-Lenz, with a reported range of more than 150 miles.

The second system has a reported range exceeding 600 miles, although its manufacturer was not identified for security reasons. The drones provide Ukraine with additional long-range strike capacity that can be produced and deployed in larger numbers than more expensive Western cruise missiles.

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British drones hit Russia for first time in Ukraine’s deep-strike campaign – The Sunday Times

The reported deployment marks a further expansion of UK military support for Ukraine as Kyiv increasingly takes the fight to Russian military and energy infrastructure inside Russia.

Ukrainian forces have used British drones to attack targets inside Russia for the first time, adding two UK-built systems to Kyiv’s arsenal, The Sunday Times reported on 15 August, citing Ukrainian military sources. The newspaper explicitly identified oil refineries in Volgograd and Yaroslavl among the targets struck during the previous six months.

Ukraine still relies mainly on domestically produced drones. But the British systems give Kyiv cheaper weapons that can be replenished and launched in volume. They help sustain Kyiv's attacks on Russian oil, logistics, and military targets without running down limited stocks of Western long-range missiles.

The Sunday Times called this a new phase in UK–Ukraine military cooperation. A senior British defense source said the deployments showed London was “not nervous anymore” about Russian pressure.

What British support adds to Ukraine’s homegrown drone force

Britain has supplied Ukraine with two systems with very different ranges. The Nyan, a jet-powered one-way attack drone made by BAE Systems subsidiary Callen-Lenz, can travel more than 150 miles. The second is catapult-launched and has a range above 600 miles; The Sunday Times withheld its manufacturer’s name on security grounds.

Long-range drones typically cost £50,000 to £100,000, compared with more than £750,000 to replace a Storm Shadow missile, the newspaper said. They can also be stockpiled and launched in swarms, helping Ukraine strain Russian air defenses without exhausting finite missile stocks.

The drones extend wider British support. In June, the UK announced funding for 150,000 Ukrainian-produced drones by the end of 2026. Ukrainian forces have also deployed British Rapid Ranger systems against Russian Shaheds and used UK-supplied Storm Shadows inside Russia, protecting Ukraine at home while widening its options across the border.

Ukraine’s deep-strike campaign reaches 52 Russian regions

Across Ukraine’s overall campaign, The Sunday Times reported almost 700 successful deep strikes between January and June. They reached 52 Russian regions and caused more than £35 billion (about $47.3 billion) in economic damage.

A senior Ukrainian military source said the British systems were proving successful. “When we launch them, we always say Slava Ukraini and God save the King,” the source told The Sunday Times.

Former UK Air Marshal Greg Bagwell predicted Moscow would “sabre rattle” and potentially declare British factories legitimate targets. Other defense sources warned of intensified cyberattacks or espionage against the UK.