A car drove through pedestrians - including a group of French school children - on Westminster Bridge before crashing into railings outside Westminster Palace. The driver then entered Westminster Palace on foot and stabbed a police officer who has subsequently died before being shot several times.
The police are treating it as a terrorist attack but have refused to be drawn on who they believe is to blame. However, a picture of the suspected attacker is being shared on social media and the method of the attack is a common theme across Europe.