RIIO-2 Network Asset Risk Metric methodologies audit

RIIO-2 Network Asset Risk Metric methodologies audit | Ofgem Please enable JavaScript in your web browser to get the best experience. BETA This site is currently in BETA. Help us improve by giving us your feedback . Close alert: RIIO-2 Network Asset Risk Metric methodologies audit Publication type: Consultation Publication date: 20 February 2026 Closed date: 21 March 2026 Status: Closed (awaiting decision) Topic: Electricity transmission, Gas transmission, Gas distribution Print this page Share the page Share on Facebook Share on Twitter Share on LinkedIn Our assessment of proposed modifications to the Network Asset Risk Metric methodologies used in the energy transmission and gas distributions sectors. Consultation description During RIIO-2, audits were completed across the electricity transmission, gas transmission and gas distribution sectors. These outlined 3 different categories of changes needed. This consultation sets out the changes proposed by gas distribution networks, electricity transmission owners and National Gas Transmission and our assessments of these. Who should respond We would like views from licensees and other gas and electricity network companies, particularly those with an interest in Network Asset Risk Metrics. How to respond Submit your response by 20 March 2026 by emailing assetriskresilience@ofgem.gov.uk . Consultation documents Modifications to RIIO-2 Networks Asset Risk Metric (NARM) consultation [PDF, 238.19KB] Electricity Transmission Common NARM methodology [PDF, 726.51KB] Gas Distribution Networks NARM methodology [PDF, 9.84MB] National Grid Electricity Transmission (NGET) Network Asset Risk Annex methodology [PDF, 3.20MB] National Grid Gas Transmission (NGT) NARM methodology [PDF, 3.52MB] SP Transmission and SSEN Transmission Network Asset Risk Annex and NARM methodology [PDF, 1.79MB] SP Transmission Licensee Specific Appendix - NARM methodology [PDF, 1.33MB] SSEN Transmission Licensee Specific Appendix - NARM methodology [PDF, 1.36MB] Print this page Share the page Share on Facebook Share on Twitter Share on LinkedIn Close