British defence officials and industry figures have warned that insisting on buying exclusively from domestic suppliers could leave the armed forces vulnerable if it means forgoing the best available technology. Their comments came amid calls from government ministers to increase the proportion of defence spending directed toward UK companies.

Defence Secretary Dan Jarvis recently praised Greater Manchester mayor Andy Burnham’s push for greater investment in British defence firms, describing them as the “backbone” of the nation’s industrial base. Jarvis has advocated raising the current 85 percent level of UK-sourced defence procurement to provide armed forces with advanced domestic technology and manufacture. He emphasized supporting companies from large enterprises to small and medium-sized innovations, citing new investments in hybrid naval vessels, unmanned ground vehicles, drones, and drone defence systems being developed in the UK.

Burnham, poised to become prime minister in the coming days, has said Labour would further boost British workers and businesses through a sustained increase in defence investment. He argues that such spending will not only ensure the military’s operational needs are met but also foster economic growth and create apprenticeships and jobs in communities across the country.

Despite this, some senior military officials and defence industry insiders urged caution against an overly nationalistic procurement approach. One source emphasized that while “reindustrialisation” of the defence sector is a valid goal, it is a long-term endeavour potentially spanning 15 years. They added that if immediate conflict arises, advanced, proven equipment will be essential—regardless of its origin.

A senior military officer acknowledged Burnham’s position but described the issue as nuanced, emphasizing the need to balance securing cutting-edge technology with supporting UK-based companies that contribute to the domestic economy. Another industry expert argued the Ministry of Defence should only buy British equipment “when what we produce is world-class,” citing successful UK projects such as the Dreadnought and AUKUS-class submarines, Type 26 and 31 frigates, and Typhoon fighter jets as examples.

However, this source cautioned against sometimes significantly higher costs associated with British-made kit compared to foreign alternatives. They pointed to a prevailing anti-American sentiment linked to current political attitudes toward the United States, warning that rejecting American equipment on that basis could undermine interoperability and joint operational capabilities. The official noted that American systems are both capable and affordable, and given the likelihood of allied cooperation, particularly with the U.S., access to compatible technology remains crucial.

A former military source familiar with defence spending debates summarized the challenge as finding the “perfect answer” of acquiring the best equipment quickly and cost-effectively while ideally supporting UK industry. They recognized that these goals can conflict but stressed the importance of simultaneously growing sovereign capabilities and aligning procurement choices with strategic and economic priorities over time.

Recent investments by the Ministry of Defence reflect this balance, including a £190 million purchase of U.S. surface-to-surface precision strike missiles, which previous ministers had resisted in favor of developing sovereign capabilities free from foreign components. The defence investment plan is projected to generate up to 60,000 new British jobs by 2030, contributing to broader economic objectives alongside military readiness.

As the government prepares for a defence budget review, the debate over prioritizing British suppliers versus sourcing proven foreign technologies is likely to intensify, underscoring the complex interplay between industrial policy, operational requirements, and international partnerships.