The United Kingdom, Finland, the Netherlands, and Poland have agreed on the next steps in developing the new Multilateral Defence Mechanism (MDM), an initiative designed to accelerate defence investments and joint materiel procurement. The countries aim to establish the mechanism by 2027 and to begin formal treaty negotiations in the near term.

According to a joint press release published by, among others, the British government and the Finnish Ministry of Defence, the MDM is intended to function as a new financing model to increase investment in critical defence capabilities, stimulate joint procurement, and coordinate demand among like-minded allies. The initiative is described as a response to the changed security environment and Russia's continued war of aggression against Ukraine.

In the joint declaration, the four countries state that they will now work to expand cooperation to include additional participants, continue the technical development of the mechanism during the autumn, and ensure that the model complements other international defence financing initiatives while strengthening interoperability within NATO.

"Europe's defence procurement is too fragmented, too costly, and too slow. That is why I have been working to establish the Multilateral Defence Mechanism, which will strengthen cooperation, improve procurement, and reinforce our collective deterrence," said UK Chancellor of the Exchequer Rachel Reeves in the British press release.

She also welcomed Poland as a new participant in the initiative.

"In a world that is changing around us, we are strongest when we work together with our allies. I am pleased to welcome Poland to the Multilateral Defence Mechanism to strengthen our defence and keep us and our allies safe," said Rachel Reeves.

UK Minister for Defence Procurement Dan Jarvis described the initiative as a means of strengthening both deterrence and defence through closer cooperation with European allies and NATO.

Nordic Defence Sector reported in March that Finland, the United Kingdom, and the Netherlands had begun work on examining the new financing mechanism. The aim at that stage was to create a complement to existing structures within NATO and the EU, in order to accelerate joint procurement and strengthen the production capacity of the European defence industry. With Poland's accession, the initiative's core group has now expanded to four countries.