The pavement erupted, sending a fireball into the air after a fault on the underground electricity network. 1, 867 customers were affected when power to the area was disrupted. All supplies were reconnected by engineers by yesterday afternoon.
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Captain Mike Green, a senior flying instructor, was piloting the two seater helicopter involved in the crash.
A memorial service marked the 30th anniversary of the King's Cross fire which claimed the lives of 31 people.
The athlete, who has been out injured since a motorbike crash in January, has been told he wont receive his annual £21,000 lottery funding.