New British Prime Minister Andy Burnham used his first trip abroad since taking office to hand Ukraine something money can't easily buy: the classified know-how to start building its own long-range cruise missiles at home.

The UK government has authorized defense manufacturer MBDA to release classified details of British-made components used in the SCALP missile — the French-produced sibling of Britain's Storm Shadow — clearing the way for Ukraine and France to move ahead with plans to assemble the weapon on Ukrainian soil, according to Forces News. Burnham announced the decision Monday during a visit to Kyiv marking Ukraine's 35th Independence Day.

What the Missile Can Do

SCALP/Storm Shadow is a roughly 1,300-kilogram, 5.1-meter air-launched cruise missile with a range of about 150 miles (240 km) and a blast-and-penetrator warhead designed to punch through hardened bunkers and other reinforced, high-value targets. Kyiv and Paris are aiming to have a Ukrainian assembly line for the missile running by the end of the year, according to reporting from the Washington Post. The move is separate from Project Brakestop, a distinct UK program developing a longer-range, ground-launched weapon with a reach beyond 500 kilometers.

Burnham framed the decision as a direct answer to Kremlin pressure, telling reporters in Kyiv:

"DESPITE RUSSIA'S OUTRAGEOUS THREATS TO MY COUNTRY, WE WILL CONTINUE OUR SUPPORT FOR UKRAINE."

Moscow wasted no time responding. Russian Foreign Minister Sergei Lavrov warned that deeper British involvement in Ukraine's missile production could be treated as "participation in the war, with all the ensuing consequences" — a familiar formulation Russian officials have used to threaten Western states supplying Kyiv with increasingly capable weapons.

What's Next

The technical release doesn't put missiles in Ukrainian hands overnight; standing up a domestic assembly line involves everything from securing supply chains for sensitive components to training technicians, and officials have offered only a rough end-of-year target. Still, the symbolism is significant: it signals the UK and France see Ukraine's ability to sustain a long-range strike capability, not just receive one from abroad, as a long-term priority even as a wider ceasefire remains elusive.