Westminster Tube station has been closed following the attack, as police continue to assess the damage after a shock attack on the grounds of Westminster Palace.
A huge area around the palace has now been cordoned off, including the bridge, as police remain on high alert in fear of any subsequent attacks on what it the heart of Britain's political establishment.
This is the path of destruction in London on Wednesday when pedestrians on Westminster Bridge were mowed down by a frantic driver before a police officer in the Houses of Parliament was stabbed.
The terror began at the south London end of the bridge when a driver in a Hyundai 4X4 mounted the pavement, mowing down the first pedestrians.
They are also used by other MPs, staff and visitors.