Britain is preparing one of its biggest military overhauls in decades, remodeling its armed forces around lessons learned from Ukraine’s battlefield tactics. The Defence Investment Plan, due Tuesday from Prime Minister Keir Starmer, will prioritize “cheap systems destroying high-value targets and innovation cycles measured in weeks, not years,” according to the Ministry of Defence.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official. The shift marks a break from Britain’s long-standing reliance on expensive, high-end platforms such as aircraft carriers, submarines and nuclear deterrence as the core of its military power. Russia’s war in Ukraine has accelerated the rethink across NATO, exposing the limits of costly legacy systems and elevating mass drones, autonomous weapons and rapid battlefield innovation. One of the most striking changes is the likely cancellation of planned Type 83 destroyers and Type 32 frigates. Instead, the UK will focus on new “Common Combat Vessels” designed to command swarms of unmanned sea, air and underwater systems. The Royal Air Force is also moving toward autonomous air combat, with a new “Collaborative Combat Air Programme” aimed at pairing crewed jets with drones equipped with artificial intelligence (AI), alongside allies in Italy and Japan. The investment also comes as defense planners across NATO increasingly treat Ukraine as a live laboratory for drone warfare that drives procurement decisions.