Outgoing UK Prime Minister Keir Starmer announced on Tuesday that Britain will spend nearly £300 billion ($397 billion) over the next four years to modernize its armed forces amid rising threats, including from Russia. The announcement came as Starmer, who is expected to leave office next month after losing support from Labour MPs, launched his long-awaited 10-year Defense Investment Plan.
Additional Funding and Rationale
The overall defense budget will increase by £15 billion over the next four years, reaching almost £300 billion. Starmer stated, "Last year I made the decision in the national interest to reprioritize aid spending toward defense and achieved the biggest uplift in defense spending since the end of the Cold War. That was the right choice because the world has changed. National security is economic security. Today we uplift defense spending further. An additional £15 billion worth of funding by reprioritising spending across government."
Investment in Drones and Autonomous Systems
The plan includes more than £5 billion for drones and autonomous systems over the next four years, according to a press release from the Ministry of Defense (MoD). This investment aims to modernize the UK's military capabilities in response to evolving threats.
Political Context and Resignations
The announcement follows months of internal wrangling within Starmer's Labour government over resources needed for modernization. Two defense ministers resigned earlier in June 2026 in a dispute over spending proposals, including Defense Secretary John Healey, who warned that the plans risked making Britain "less safe."
NATO and US Pressure
The UK's pledge aligns with US President Donald Trump's repeated calls for NATO allies to increase defense spending and reduce reliance on Washington for security. The plan is seen as a response to these pressures and the changing global security landscape.
