- Defence Ministers sign agreement to work closely on Air Defence Complex Weapons - UK confirms long-term support for Poland’s rapid air defence modernisation programme following the first delivery of Narew - Nations agreed to collaborate on Poland’s procurement of three Arrowhead-140 frigates According to a statement: “At the Zamość Military Base in Poland today, UK Defence Secretary Ben Wallace and Poland’s Deputy Prime Minister and Minister of National Defence Mariusz Błaszczak signed an Air Defence Complex Weapons Memorandum of Understanding (MOU).This enables the UK and Poland to cooperate in the development and manufacture of current and future complex weapons, further strengthening the relationship built through the Defence and Security Cooperation Treaty (2017) and deepening the interoperability of our Armed Forces.” The Ministers also signed the Arrowhead-140 Statement of Intent which provides a framework for the UK Government and The Government of Poland to collaborate on the procurement and operation of three Arrowhead-140 frigates.I suppose much will depend on the size and what can be cold gas ejected on a warship although Mk41 VLS may open up options for it to be hot launched if it’s a much larger missile.Not sure that such IP transfer would be appropriate for some of those you mention mind, with Poland you can get a lot back in exchange and you have a higher level of trust.The uk could benefit in getting in on the Korean/polish tank, artillery that will be developed among other projects."