Aug. 24 (UPI) — On his first visit to Ukraine as British Prime Minister Andy Burnham promised Monday to share Anglo-French long-range cruise missile technology with Kyiv in its fight with Russia, saying Britain would stand with Ukraine until there was “a just and lasting peace.”

Burnham said European defense contractor MBDA would be authorized to declassify blueprints for the parts of the Storm Shadow/Scalp missiles that are made by Britain to help Ukraine build its own version of the weapon that Britain has for the past three years been giving to Kyiv.

The Storm Shadow enables Ukrainian forces to hit targets 150 miles inside Russia.

Burnham said Britain would join forces with France to build production plants in Ukraine following a similar pledge of help by President Emmanuel Macron, who also told Zelensky at the weekend that France would supply Kyiv with more anti-missile interceptors in the wake of a series of deadly ballistic missile strikes.

“On Ukraine’s 35th anniversary of independence, the Ukrainian people should be in no doubt: the U.K. is behind you today and for as long as it takes. I am proud of the contribution our country has made to Ukraine and I want the Ukrainian people to hear it directly from me that our support will not waver. After all, Ukraine’s security is our security,” Burnham said in a statement issued Sunday night.

“The friendship between our two countries will long outlast Russia’s illegal war. In both the fight and in the rebuilding to come, we will stand with Ukraine and deliver opportunities for people across both our countries. Russia should be in no doubt of our resolve. We will not back down until there is a just and lasting peace,” said Burnham.

Kremlin spokesman Dmitry Peskov likened the missile plan to pouring gasoline on relations with Russia and warned Britain over “participating in this war” on Ukraine’s side, saying that the Russian military was actively collecting data to uncover and destroy any missile production sites.

“Britain is methodically and regularly adding fuel to the fire and methodically and regularly plotting to prevent any progress in the peace process,” said Peskov.

Burnham’s high-profile, public backing for Zelensky came as he faces challenges both from nightly Russian ballistic missile strikes and to his authority, amid calls for elections which have been suspended for more than four years since Russia’s full-scale invasion in 2022.

As well joining Ukrainian President Volodymyr Zelensky for Independence Day celebrations in Kyiv, Burnham was also scheduled to chair a meeting of the U.K.-France-led Coalition of the Willing for talks on providing more help to Ukraine.

Established in 2025, the focus of the 34 country plus Ukraine partnership is to provide security guarantees in the event a cease-fire agreement is reached, including providing a multinational force to support and monitor it from day 1, though not necessarily in the format of a traditional peace-keeping force.

The stand by Burnham, coincided with a similar pledge from from Brussels, backed up by a multi-billion dollar package of fresh European Union military aid.

“On Ukraine’s Independence Day, we show our unfaltering support. Today, we approved $7.1 billion for the air and missile defense systems, missiles, ammunition and radars that Ukraine urgently needs. Europe stands with you today, tomorrow, and for as long as it takes,” European Commission President Ursula von der Leyen said in a post on X.

The package is in addition to $18.7 billion already approved by the 27-country bloc, $9.7 billion of which has already been provided to Kyiv.