Original Report:
Podcast created via NotbookLM:
(Summary from NotbookLM) This comprehensive report from the National Energy System Operator (NESO) details the root causes, impacts, and recommendations following a major power outage and fire at the North Hyde 275kV substation on March 20, 2025. The incident, caused by a catastrophic failure and fire on Supergrid Transformer 3 (SGT3) due to moisture ingress, led to the tripping of two other transformers (SGT1 and SGT2) and a complete loss of supply to over 70,000 customers, including Heathrow Airport, which subsequently closed. The report analyzes asset management failures, site fire controls, and the resilience of Critical National Infrastructure (CNI), ultimately proposing recommendations for improving energy system security and continuity of service.