This video can not be played
Russia has warned of "consequences" following confirmation that British-made drones were used in recent Ukrainian strikes in Russia.
The Russian embassy in the UK accused Britain of "deliberately opting for an escalation of the Ukraine crisis" as Kyiv has stepped up attacks on Moscow and other parts of the country in recent weeks.
In particular, the attacks have targeted oil refineries and warehouses of the largest online retailer Wildberries.
UK Prime Minister Andy Burnham has said London will continue "to support Ukraine 100%".
The BBC's Caroline Hawley explains what we know about Russia's warning.
More on this story.
Why has Russia threatened the UK and what happens next? Video, 00:01:05
Up Next. Watch: Stargazers around the world glimpse 'Blood Moon' lunar eclipse. Video, 00:01:04
Tracing the deadly path of the Nepal-Tibet flash flood. Video, 00:02:01
Worker films moment he escapes deadly Nepal floods. Video, 00:00:51
What caused the Nepal-Tibet flash floods? Video, 00:00:59
BBC visits hospital in Kathmandu as families wait for news. Video, 00:01:55
How Dolly Parton became a fashion icon. Video, 00:01:12
Aerial footage shows flash flood on Nepal-Tibet border. Video, 00:00:34
Dolly Parton: The life of an iconic country singer. Video, 00:00:10
Is UK's Storm Shadow missile a game changer for Ukraine? Video, 00:01:37
Robot boxing, football and sprinting at World Humanoid Games. Video, 00:01:24
Watch: Moment humanoid robot beats Usain Bolt's 100m record. Video, 00:00:46
Copyright © 2026 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.