As transmission and distribution networks face growing pressure from grid congestion, renewable integration, electrification, and increasing resilience risks, traditional infrastructure-led solutions alone are no longer sufficient. This presentation explores how a whole-system approach can help network operators deliver faster, more affordable, and more resilient energy transitions. Drawing on Arup's experience across grid planning, flexibility markets, energy system modelling, digitalisation, resilience assessment, and network delivery, we will demonstrate how combining infrastructure, flexibility, digital solutions, market mechanisms, and stakeholder considerations can unlock better outcomes. The session will highlight practical strategies for creating future-ready networks capable of supporting a decarbonised and increasingly complex energy system.