LONDON (Reuters) - The cause of the fire at a substation which forced Britain's Heathrow Airport to shut down for almost a day remains unknown, the National Energy System Operator said on Thursday.
Heathrow Airport Shutdown: Fire Cause Still a Mystery
LONDON (Reuters) - The cause of the fire at a substation which forced Britain's Heathrow Airport to shut down for almost a day remains unknown, the National Energy System Operator said on Thursday.
The operator said it would continue with investigations before publishing a final report in June.
(Reporting by Muvija M and Sarah Young; Editing by Catarina Demony)
