Britain Commits GBP 190 Million to Join the US–Australia Precision Strike Missile Programme, a 500 km Round From 2027

The money, about USD 254 million, buys Britain a partner's place in the PrSM programme rather than a shelf of missiles: the Ministry of Defence frames it as joining a collaborative United States–Australia effort, with workshare and a line into the AUKUS Pillar 2 agenda. PrSM is Lockheed Martin's surface-to-surface ballistic missile; its Increment 1 production variant reaches up to 500 kilometres — the range the weapon gained once the INF Treaty's cap lapsed — and fires from the M270A2 launchers the British Army already operates. First deliveries could come in 2027.

The timing drew a straight line across the summit. On the same day, Rheinmetall and Lockheed Martin signed toward a joint venture to build the ATACMS in Germany — the very missile the US Army is retiring, and the one PrSM was designed to replace. Two allies thus extended ground-based deep strike from opposite ends of a single American family: Britain buying into the successor, Germany building the incumbent.

The proprietary read. The PrSM buy is the tidy end of a messier European push for range. As Signal No. 98 noted, London took the finished successor off the shelf while Berlin arranged to manufacture the weapon it replaces — the same divergence that runs through the whole summit, between allies who buy American capability and allies who want to build it at home. Britain's separate, larger Deep Precision Strike initiative, unveiled the next day with a dozen European partners, is the sovereign ambition; the PrSM cheque is what a deliverable 500-kilometre round looks like in the meantime.