At about 2.30pm on Wednesday afternoon, the suspect drove a grey Hyundai car across Westminster Bridge, hitting pedestrians along the way.
:: Two people on the bridge were killed as the attacker sped towards Parliament.
:: Another woman was treated for serious injuries after falling into the River Thames.
:: Among those targeted on the bridge were a group of French schoolchildren.
:: At least 40 people were hurt. A junior doctor at St Thomas’ Hospital said some had suffered “catastrophic” injuries.
:: The London Ambulance Service said it had been called at 2.40pm. The first crew arrived within six minutes. The service said it had treated at least ten patients on Westminster Bridge.
:: Witness Richard Tyse said: “I came out of Westminster tube station which was being locked down behind me (by police). I was ushered onto Westminster Bridge and looked onto the west pavement of the bridge and literally north to south I must have counted 8-10 prostrate figures on the ground.”
:: After the car had crossed the bridge, it was rammed into railings at the Houses of Parliament.
:: The suspect then left the car and stabbed a police officer in the grounds of the Palace of Westminster. The officer died.
:: Gunshots were heard at about 2.45pm as a second officer opened fire on the suspect.
:: The suspect was later seen on a stretcher being tended to by medics as armed police officers stood alongside. He died.
:: An air ambulance landed at about 2.53pm.
:: The House of Commons was suspended at 2.55pm.
:: Witness Rick Longley said: “We were just walking up to the (tube) station and there was a loud bang and a guy, someone, crashed a car and took some pedestrians out. They were just laying there and then the whole crowd just surged around the corner by the gates just opposite Big Ben. A guy came past my right shoulder with a big knife and just started plunging it into the police officer. I have never seen anything like that. I just can’t believe what I just saw.”
:: At 3.32pm, police declared it a “terrorist incident”.
:: The Metropolitan Police’s Acting Deputy Commissioner and Head of Counter Terrorism, Mark Rowley, said: “We are satisfied at this stage that it looks like there was only one attacker, but it would be foolish to be overconfident so early on. For a precautionary basis are locking down the area and doing all the necessary searches so we can be completely confident that everyone is safe.”
:: At 3.27pm, President Trump said in a meeting he was “just getting an update on London. Big news”.
:: At 3.33pm Theresa May was bundled into a car which sped away from Parliament after the attack. MPs were also evacuated from the Commons chamber.
:: At 4.25pm, a suspicious package was found in Parliament and a bomb squad called.
:: The Prime Minister chaired a meeting of the government’s emergency Cobra committee. Speaking in Downing Street afterwards, Theresa May described the attack as “sick and depraved”.
:: Police confirmed in a briefing at 10.30pm that the death toll had risen to five – including a police officer, named as PC Keith Palmer, and the terrorist.