According to Downing Street, the Prime Minister spoke with NATO Secretary General Mark Rutte on 13 June and both agreed that allies must strengthen collective defence and deliver more quickly in response to shared and changing threats. The statement is short, but the policy message is clear. The government is presenting UK defence choices as part of a wider NATO effort, rather than as a domestic spending announcement in isolation.
Downing Street said the Prime Minister updated Mr Rutte on plans for a Defence Investment Plan and confirmed that it will be published before the NATO summit in Ankara. That timetable matters because it gives allies a formal UK document ahead of the meeting, not simply a broad political commitment. The government communication does not yet set out the content of the plan. There is no detail at this stage on capability priorities, spending phasing or delivery milestones, so Parliament, industry and allies are still waiting to see where the emphasis will fall.
The statement also records that the NATO Secretary General welcomed the UK’s increased defence investment as an important contribution to the Alliance and to meeting current threats. From a policy standpoint, that endorsement helps place the UK on the side of allies arguing for faster movement from spending pledges to deployable capability. That matters because NATO scrutiny is no longer limited to headline spending ratios. The practical test is whether member states can translate higher budgets into readiness, equipment availability, force protection and sustained support capacity.
Downing Street further said that the Prime Minister reiterated a commitment to reach 3% of GDP on defence in the next Parliament. This is a significant political marker, but it remains a future target rather than an immediate spending baseline. The government statement does not specify the year-by-year path to 3%, the exact accounting basis that will be used, or whether any security-related spending outside the Ministry of Defence would count towards the figure. Those details will shape how substantial the commitment proves to be in practice.
The Prime Minister’s description of national security as the government’s top priority is also important in budget terms. It signals that defence will continue to be given strong weight in future spending decisions, even if that requires difficult choices elsewhere. For the Treasury and the Ministry of Defence, this turns the debate from rhetoric to sequencing. A higher defence share of GDP will need to be matched by funded programmes, procurement decisions and a clear timetable if the pledge is to move beyond alliance signalling.
According to Downing Street, the call ended with agreement to stay in close contact. That is standard diplomatic language, but in this context it suggests further coordination before the Ankara summit as allies compare national offers and capability plans. What follows next will matter more than the read-out itself. The Defence Investment Plan will need to show how the government intends to match a 3% ambition with timing, funding and capability choices. Until that document is published, the call serves mainly as a clear policy signal that the UK wants to arrive at the NATO summit with a stronger defence spending case already on the table.