According to a 10 Downing Street readout published on 20 September, the Prime Minister spoke with Danish Prime Minister Mette Frederiksen before both leaders travel to New York for the United Nations General Assembly. The conversation set out the UK government's attempt to connect multilateral diplomacy with domestic priorities, particularly living costs and public security. Downing Street said the Prime Minister intended to use the UN visit to pursue greater global stability and closer international partnerships. In policy terms, that presents foreign engagement as part of the government's economic and security case at home, rather than as a separate diplomatic track.
Arctic and North Atlantic security formed the main defence element of the call. Downing Street said the two leaders discussed the expected signing this week of a new agreement between the United States, Greenland and Denmark to strengthen security in the Arctic and North Atlantic area. That detail matters because the readout places the High North firmly within the wider Euro-Atlantic security discussion. By welcoming a stronger US commitment to the region, London and Copenhagen signalled that northern defence is being treated as a shared strategic concern.
The Prime Minister also congratulated Frederiksen and the Kingdom of Denmark on securing what the statement described as a deal benefiting the United States, Greenland and Denmark. He added that he would pass on his congratulations to President Trump. For policy readers, the wording is notable. The UK is not presented as a party to the agreement, but the endorsement is explicit and politically important. It shows London aligning itself with a settlement that Copenhagen and Washington regard as relevant to regional security.
Ukraine was the other principal security file in the exchange. According to Downing Street, the Prime Minister said he hoped to make further progress with partners on stepping up support for Ukraine during the UN General Assembly and in the weeks that follow. That places the New York meetings within a clear diplomatic timetable. The government is using UNGA not only for formal speeches, but also as a forum for practical coordination with allies on continued backing for Kyiv.
The call also offers a more precise account of how the government intends to use the UN week. The Prime Minister linked his New York visit to specific outcomes: reducing cost-of-living pressure through greater global stability, strengthening security through closer partnerships and sustaining partner coordination on Ukraine. For officials and external observers, that is a deliberate framing choice. It suggests ministers want international engagement to be judged against concrete domestic and security objectives, rather than against diplomatic visibility alone.
Downing Street concluded by saying the two leaders agreed to stay in close touch. In routine diplomatic language, that points to continued contact as UNGA begins and as talks on northern security and Ukraine move into a more intensive phase. The immediate policy point is one of alignment. London is publicly backing Denmark's diplomacy with Washington and Greenland while seeking further movement on Ukraine, with the United Nations General Assembly serving as the next venue for both.