A hybrid architecture developed by the project combines GNSS with signals of opportunity (SOOP), including 5G, LTE, and Iridium satellite signals. By exploiting these alternative signals, the system ensures positioning and timing continuity even when GNSS signals are degraded or manipulated. Key innovations include authentication of GNSS and SOOP signals, secure time transfer, hybridization techniques to merge multiple data sources, and a network architecture designed to reduce latencies and improve resilience. Partners said the project establishes a robust foundation for future PNT assurance systems that could serve critical industries, transport, and national infrastructure. Next steps include integrating these innovations into commercially viable assurance products, strengthening hardware platforms, and expanding the system’s applicability to real-world markets.