A Ukrainian soldier tests a fiber-optic-controlled drone designed for the Ukrainian Armed Forces, near Kyiv, Ukraine, 29 January 2025. Drones controlled by fiber optics can infiltrate enemy lines undetected by electronic warfare devices, and engage targets from outside the enemy's line of sight. EPA-EFE/VITALII NOSACH 
The government on Monday endorsed an independently-produced Strategic Defence Review, which calls for a more lethal, tech-driven army to counter emerging threats, including possible Russian aggression.
Britain, one of Ukraine's staunchest Western supporters, plans to learn from Kyiv's more than three-year fight against Russian invasion, during which drones have transformed the battlefield.
The 350-million-pound ($473 million) drone package is part of a broader 4.5-billion-pound military support initiative for Ukraine, the government said.
Defence Secretary John Healey will make the announcement at a 50-nation Ukraine Defence Contact Group meeting in Brussels, co-hosted with Germany.
"The UK is stepping up its support for Ukraine by delivering hundreds of thousands more drones this year and completing a major milestone in the delivery of critical artillery ammunition," Healey said in a statement ahead of the meeting.
In addition to the drone deliveries, Britain said it has completed the shipment of 140,000 artillery shells to Ukraine since January and will spend a further 247 million pounds this year training Ukrainian troops.
($1 = 0.7402 pounds)
(Reporting by Sam Tabahriti; editing by Mark Heinrich)