Network Rail Infrastructure Limited operates as a dedicated mobile network within the United Kingdom, specifically tailored to support critical railway infrastructure communication. Identified by the Mobile Country Code (MCC) 235, representing the UK, and the Mobile Network Code (MNC) 95, this network plays a vital role in ensuring the smooth and safe operation of the nation's rail system, a crucial part of Europe's transport network, which operates in accordance with European Railway Agency standards. Unlike public mobile networks like Vodafone, EE, or O2, the Network Rail Infrastructure Limited network focuses on bespoke communications for railway staff, signalling systems, and other essential operational functions. The significance of Network Rail Infrastructure Limited’s MCC and MNC designation lies in its ability to manage and prioritize railway communications efficiently. While other UK networks provide broad coverage for consumers, Network Rail's network can be optimized for specific geographical areas along railway lines, enhancing reliability for critical applications. This specialized approach contrasts with the general-purpose mobile networks, which must balance the needs of private subscribers with railway business needs. Given the safety-critical nature of rail operations in the UK, this dedicated network helps minimize interference and provides resilience, a feature constantly being innovated and expanded, sometimes supported by international collaborations and partnerships.