Security experts are warning that Russia is increasingly using 'grey-zone' tactics to test Britain’s defences without triggering open conflict. Former RN commander Tom Sharpe believes it is highly likely that Moscow will eventually deploy drone swarms against UK targets, potentially disrupting major airports such as Heathrow or critical national infrastructure. His comments follow the interception of a Russian reconnaissance aircraft which approached HMS Prince of Wales and reportedly dropped underwater tracking devices near the carrier. Analysts say such incidents form part of a wider pattern of intelligence gathering, cyber attacks, and military probing designed to stretch Western resources and expose vulnerabilities. Reports have also highlighted concerns about Russian 'shadow fleet' vessels allegedly being used to launch drones or monitor sensitive locations. Experts warn that repeated confrontations in the air, at sea, and in cyberspace increase the risk of accidental escalation, even if neither side seeks direct war. Defence specialists continue to call for faster investment in counter-drone technology, cyber resilience, and protection of critical national infrastructure.