The cause of the fire that disrupted Heathrow Airport operations remains unknown, with ongoing investigations focused on preventing future incidents.
The National Energy System Operator (NESO) reported that the cause of the March 21 fire at an electricity substation, which led to the temporary closure of Heathrow Airport, is still under investigation.
The incident caused significant disruptions, stranding thousands of passengers and impacting all four terminals for 18 hours. Airlines incurred considerable financial losses, and the event highlighted concerns about infrastructure resilience in the UK.
According to NESO, a final report with recommendations on energy system resilience and restoration will be published in June. Forensic investigations continue, involving the London Fire Brigade and National Grid Electricity Transmission. Authorities confirmed in March that there was no indication of suspicious activity.
Heathrow stated it looks forward to the report’s findings, which could help strengthen the UK’s energy grid. The airport emphasized the importance of understanding the fire's origin and its impact on two transformers.
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