London terror attack: Video shows attacker's speeding car

Grainy footage has emerged of the moment a car sped along London's Westminster Bridge, ploughing into pedestrians.

Five people - including the attacker and an unarmed police officer - died in the terror attack on Wednesday afternoon (local time) near the Houses of Parliament.

Around 40 people were injured.

The footage shows the grey Hyundai i40 accelerating past other traffic, including double-decker buses.

A woman can also be seen falling from the bridge into the Thames River below.

The Port of London Authority said the woman was rescued alive from the water, but had serious injuries.