As telecom operators pursue Intelligent Network Modernisation, energy visibility across the Radio Access Network is becoming a critical foundation for more efficient, sustainable operations. Virgin Media O2 needed accurate, real-world insight into energy consumption across its live modernised RAN infrastructure to support future optimisation and informed network-wide decisions. Following a successful VISMON Energy deployment on their RAN sites, we were engaged to extend the solution to a set of modernised sites, establishing a high-granularity measurement baseline without impacting network KPIs. The programme supported VMO2’s sustainability and network modernisation goals by validating new RAN equipment efficiency and trialing energy optimisation options.