Heathrow airport: fire at substation causes thousands of flight cancellations

Hundreds of thousands of passengers were unable to fly in or out of London Heathrow airport after an 'unprecedented' fire broke out at an electrical substation in Hayes. The Metropolitan police confirmed that the counter-terrorism command was leading inquiries as to the source of fire, but stressed there was 'currently no indication of foul play'
Travel chaos as Heathrow airport closes after blaze at electrical substation