Light flashes fiercely as the plane is struck by three bolts of lightning. Thunder is heard loudly rumbling after the lighting strike
'When I watched it back I thought 'Oh my God it's hit the plane. Flipping heck'.
'It was such a large bolt it looks like it hit the floor. I just hope no one was hurt.
'It looked like it just missed St James' Church across in Bermondsey.'
The video was recorded on June 6.
One person on Twitter, Andrew McCluckie, said: 'Would not like to have been on that plane approaching Heathrow that just got hit by lightning.
'Looked f*****g cool though.'
What happens when lightning strikes a plane?
Commercial aircraft around the world are bombarded with bolts of lightning every single day.
It is thought that on average each plane is struck at least once every two years.
The fuselage of most planes is made of conductive aluminium. Travelling through storm clouds, where huge amounts of static electricity can gather, can actually trigger the discharges.
But all passenger planes are built with electrical shielding which protects the inside of the plane from the effects of lightning bolts.
Those on board often fail to notice that the plane has been hit at all or experience nothing more than a quick flash.
It is estimated that aircraft shielding is strong enough to withstand voltages ten times the amount of a typical bolt and no planes have been brought down by lightning since 1967.
The worst to be expected from a lightning blast is a visible scorch mark.
Occasionally flights that are struck early in their journey are diverted as a safety precaution.
Pilot Patrick Smith, whose book Cockpit Confidential details the exclusive world of flight captains, explains that lightning strikes on aircraft are surprisingly common.
He said: 'The energy does not travel through the cabin electrocuting the passengers; it is discharged overboard through the plane's aluminum skin, which is an excellent electrical conductor.
'Once in a while there's exterior damage, a superficial entry or exit wound or minor injury to the plane's electrical systems but a strike typically leaves little or no evidence.'
Smith recalls a flight he was captaining in 1993 where all he experienced during a lightning strike was seeing a flash and feeling a thud.
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Plane headed for Heathrow struck by THREE bolts of lightning
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