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Grid infrastructureUnited KingdomEIR-0999

Mechanical failure causes major substation fire and explosions in Edinburgh

July 2019Published 17 Sept 2026Responsible editor: Chief Editor

SignificantMechanical
Reported damageFrom the sourceHow? Know the real figure?
Figure hidden: shown to subscribersReported figure
supply cut for about •• daysShown in the record →Full estimate
From the recordRoot cause hiddenFailed part hidden
Where
Substation at Slater's Steps, off Holyrood Road in Edinburgh
Operator
ScottishPower
What
Mechanical failure caused major fire and explosions
Injuries
None reported
Cause
Mechanical failure under investigation

Companies named in the reporting of this entry (being named is not a finding of fault): ScottishPower

What happened

A substation at Slater's Steps, off Holyrood Road in Edinburgh, suffered what ScottishPower described as its first ever mechanical failure at an Edinburgh substation, causing a major fire and a series of loud explosions. Thick, acrid smoke was produced as the plastic enclosure around the equipment burned. Thousands of people were evacuated from nearby offices and flats, and some eyewitnesses initially feared a terrorist attack due to the noise and smoke.

More than 400 homes and businesses, including a nearby visitor attraction, lost power. The area was cordoned off for about four hours while police and fire services responded. A car parked beside the substation also caught fire. No injuries were reported. A new substation was installed at the site the following day, and a joint investigation by police and the fire service was launched to determine the cause.

Contributing factors

ScottishPower stated the incident stemmed from a mechanical failure, described as highly unusual and the first of its kind at an Edinburgh substation; the cause of the failure itself was under investigation at the time of reporting.

Lessons learned

  1. Plastic enclosures on substation equipment can burn and release thick smoke, so operators should review material choice and add early detection systems.
  2. Loud explosions at substations can alarm the public, so operators should prepare rapid public messages during incidents.
  3. A failed substation unit can be replaced within a day, so operators should maintain spare units and rapid installation plans.

More lessons on detection and monitoring, maintenance, inspection and ageing assets, from every incident on the register.

Not yet known

  • Exact cause of the mechanical failure
  • Equipment model and age
  • Duration of power outage for customers
  • Cost of damage and replacement

This entry is updated when these are reported. Get an alert for the next one like it.

Source

BBC News (bbc.co.uk)

Published 2026-09-17. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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