The United Kingdom is set to shift its defence strategy away from traditionally crewed warships towards increased investment in unmanned and autonomous military technologies, according to details emerging ahead of a Defence Investment Plan (DIP) expected to be published before the NATO summit on July 7.

The forthcoming plan, announced by Prime Minister Sir Keir Starmer’s government and Defence Secretary Dan Jarvis, abandons previous proposals to replace the Royal Navy’s ageing fleet with up to eight Type 83 destroyers and five Type 32 frigates. Instead, funding will be redirected to drones, autonomous underwater and surface vessels, electronic warfare, long-range missile capabilities, and AI-enabled systems. This shift is driven by evolving threats, particularly the growing undersea challenge posed by Russia, as well as lessons learned from recent conflicts in Ukraine and the Middle East.

The Type 45 air defence destroyers, which form the backbone of the Royal Navy’s fleet, are scheduled for retirement in the late 2030s. Earlier plans called for their succession by the larger and technologically advanced Type 83s, envisioned to incorporate cutting-edge weaponry such as energy-lasers for counter-drone defence. Type 32 frigates, originally intended to serve as motherships for autonomous mine-hunting and anti-submarine drones, never progressed beyond conceptual stages. The deferral of these programs has created a so-called "frigate gap," where outdated vessels are retired before replacements are available.

To address this capability shortfall, the Ministry of Defence (MoD) is establishing a dedicated uncrewed systems taskforce tasked with integrating drone warfare expertise across the armed forces. A new drone training facility recently opened in Swindon, Wiltshire, will play a central role in preparing personnel for this modernised focus. The UK’s approach echoes developments seen in Ukraine’s own Unmanned Systems Force, which has employed drones extensively, including in recent large-scale strikes on Russian positions in Crimea.

Financial negotiations have been central to shaping the DIP. Dan Jarvis, who replaced John Healey as Defence Secretary after Healey resigned amid frustration over Treasury funding limits, has reportedly secured an additional £1 billion to £1.5 billion for defence beyond the initial £13.5 billion offer. Despite this increase, the total remains below the estimated £2.8 billion considered necessary to fully modernise the armed forces. Treasury Chief Secretary Lucy Rigby has also been involved in funding discussions alongside Jarvis and officials at No. 10 Downing Street.

Further spending commitments in the plan include acquisition of 12 new F-35A stealth fighter jets capable of carrying tactical nuclear weapons, support for the joint Global Combat Air Programme (GCAP) with Italy and Japan to develop a next-generation Tempest fighter, and an allocation of approximately £500 million to enhance the UK Commando Force with drones and high-speed boats. Additionally, nearly £100 million will be directed towards new technologies including uncrewed vessels, next-generation communications, and strike drones.

Despite the Defence Investment Plan representing the largest increase in UK defence funding since the Cold War, concerns have been raised about whether the scale of the investment is sufficient. Former Chief of the Defence Staff Admiral Tony Radakin, who retired last year, cautioned that the UK risks lagging behind NATO allies and urged the incoming prime minister, likely to be Andy Burnham, to ensure defence spending reflects the severity of current threats, including potential Russian aggression. Burnham is reported to have endorsed the DIP after his team’s involvement in discussions with the MoD.

Jarvis has emphasized the importance of delivering advanced equipment to frontline forces in an increasingly complex security environment, describing the current prime minister’s role as quasi-wartime given global tensions. However, some cabinet members, including Foreign Secretary Yvette Cooper, advocate for continued reviews and enhanced defence spending beyond the DIP to keep pace with emerging challenges.

As the UK prepares to present its revised defence blueprint ahead of a critical NATO summit in Turkey, the plan underscores a marked pivot towards autonomous warfare capabilities, reflecting both technological trends and evolving geopolitical pressures on Britain’s military strategy.