Senior defence figures have warned that Britain faces an increasingly complex security environment, with concerns mounting over hostile activity linked to Russia and other emerging global threats.

Military and security experts have highlighted a range of challenges, including cyber attacks, disinformation campaigns, espionage and potential sabotage operations targeting Western nations. Officials say these threats require greater preparedness and continued investment in defence capabilities.

Recent assessments suggest that the UK and its NATO allies must remain vigilant as geopolitical tensions continue to rise across Europe. Defence leaders have stressed the importance of strengthening military readiness, modernising equipment and enhancing resilience against both conventional and hybrid forms of warfare.

The warnings come as the government prepares further defence planning measures aimed at improving national security and supporting allied commitments. Security analysts argue that protecting critical infrastructure, communications networks and public institutions has become increasingly important in the modern threat landscape.

While officials continue to emphasise that Britain remains secure, the latest assessments underline the need for long-term investment and strategic planning to address evolving global risks.