Moment Heathrow substation explodes in massive fireball sparking 18-hour airport shutdown & mass blackouts

THIS is the moment a Heathrow substation explodes in a massive fireball sparking an 18-hour airport shutdown and mass blackouts.

Footage caught on a home security camera shows the explosion erupt from behind a row of bungalows in Hayes, west London.

The explosion erupted from behind a row of bungalowsx/@UB1UB2 The massive fireball sparked an 18-hour airport shutdownx/@UB1UB2 It took place at the electrical substation in Nestles Avenue, Hayes AP:Associated Press

The...