The streets of central London came to a standstill last week after a man drove his car into people on Westminster Bridge before crashing his vehicle into gates outside parliament.
Khalid Masood, 52, killed three pedestrians and one police officer in the attack on March 22. Masood was shot and killed by a security officer as he made his way into the parliament grounds.
Police quickly shut down the area around Westminster, where the British parliament sits, and directed people away from the scene.
Photos: Bill Snaddon