Rolls-Royce Submarines outsourced the development of its intranet system to WM Reply, which employed software developers from Belarus and Siberia, violating UK Ministry of Defence (MoD) regulations that require security clearance for such work. This has raised significant concerns regarding national security, particularly the potential for adversaries to exploit the software to track the locations of British submarines. An MoD investigation revealed that WM Reply attempted to conceal the developers' identities, even suggesting deceptive practices to avoid contract cancellation. Although Rolls-Royce stated that no sensitive data was compromised, the incident has prompted serious alarms about vulnerabilities within the UK's defense supply chain. Former Defense Secretary Ben Wallace warned that this breach could undermine national security, emphasizing the persistent threat from countries like Russia and China targeting defense industry supply chains. The MoD has launched further inquiries into the matter as experts continue to voice concerns over the implications for British defense capabilities.