Military — 2026-07-28

UK Transfers Stone Cloak Electronic Warfare IP to Ukraine for Domestic Production

BLUFTransferring design IP without published contract terms or component supply guarantees risks overstating Ukrainian production autonomy while binding both sides to an untested co-development model under combat pressure.

Prime Minister Andy Burnham announced Britain will transfer the intellectual property behind its Stone Cloak electronic-warfare system to Ukraine during President Volodymyr Zelenskyy's visit on Monday, his first as UK leader and Zelenskyy's first foreign trip since Burnham took office 12. Stone Cloak is a tablet-sized jammer fitted to drones that hinders Russian air defenses from tracking and targeting them, and the UK Ministry of Defence has already supplied thousands of units to Ukrainian forces 1. Downing Street said the transfer, developed under the UK-Ukraine 100-Year Partnership, will let Ukraine manufacture and adapt the system domestically, with technical teams beginning production preparations before year's end 2. United24 Media, citing The Independent, reported the arrangement also grants Ukraine a formal production license, and UK officials said battlefield use will feed data into Britain's Project Brakestop low-cost cruise missile program 13.

Analysis
Britain's transfer moves Ukraine from recipient to co-producer of Stone Cloak, shortening the cycle between spotting Russian countermeasure changes and fielding updated jammers rather than waiting on shipments, with technical teams to begin production preparations before year end. Reporting rests on a single primary source, the Downing Street press release, with other outlets offering amplification rather than independent confirmation of contract terms, so whether Kyiv gains full design rights, an exclusive license, or narrower manufacturing permission remains unclear, and Ukrainian output will still depend on Western-sourced components and test equipment near term. The announcement's timing, days into Burnham's premiership and built around Zelenskyy's first foreign visit to him, suggests political signaling of continuity in UK support may carry as much weight as the industrial transfer itself.

4 sources

Unbreakable bond between UK and Ukraine will continue under my government - GOV.UK (10 Downing Street)
Andy Burnham to Give Zelensky 'Stone Cloak' Tech That Helps Drones Evade Russian Air Defences - IBTimes UK
UK Hands Ukraine the Keys to Stone Cloak, Its Battlefield-Proven Drone EW Technology - United24 Media
Stone Cloak Transfer Moves British Support for Ukraine from Supply to Sovereign Production - Defence Matters