Britain expands AUKUS agenda across underwater drones, artificial intelligence, nuclear submarines and defence-industrial capacity

Britain’s 2026 Defence Investment Plan broadens its AUKUS agenda beyond nuclear-powered submarines to include underwater drones, weapons, sensors and artificial intelligence. The plan also emphasizes workforce, shipyard and industrial capacity needed to sustain the trilateral partnership with Australia and the United States. These activities span the submarine-focused Pillar I and advanced-capabilities work generally associated with Pillar II. The document sets policy and investment direction rather than announcing one contract, so delivery will depend on later program decisions, export arrangements, testing and coordinated funding by all three partners.