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Will Robins/Tyler Chatterley-Russell
"Distressing" and "vivid" footage of the moment PC Keith Palmer was stabbed outside Parliament during last year's Westminster attack has been shown to an inquest into the victims' deaths.
Khalid Masood killed the unarmed officer after driving into pedestrians on Westminster Bridge on 22 March 2017.
Kurt Cochran, 54, Leslie Rhodes, 75, Aysha Frade, 44, and Andreea Cristea, 31, were also killed.
Mobile phone footage of people rushing to offer first aid was also shown.
Masood was shot dead by armed officers during the attack.
The inquest, taking place at the Old Bailey in London, was shown a "chilling" image of Masood with a carving knife in each hand.
Footage showed that after the stabbing, the attacker was momentarily distracted by other officers, allowing PC Palmer time to run further into the yard.
Masood followed, but within moments, plainclothes armed officers shot and killed him.
The whole attack lasted 82 seconds.
'Utterly helpless'
Two sisters of PC Palmer raised concerns to the court earlier that there had not been armed officers around to protect their brother on the day of the attack.
The pair have been refused legal aid - the officer's wife is already being represented.
But in a legal argument, the lawyer for the sisters, Susannah Stevens, said they wanted to be able to question the Metropolitan Police.
Ms Stevens said they were "extremely distressed" that nobody from the force had spoken to them to let them know there was "any issue" around the absence of armed officers.
She added that, if armed officers had been stationed at the gates, then PC Palmer and his colleagues would have been able "to retreat", instead of being left "utterly helpless".
Later, PC James Ross, who was on duty close to PC Palmer, told the court that the Met had moved from having armed officers on the gate to having roving patrols around the area.
The lawyer for PC Palmer's widow, Dominic Adamson, said: "From a position where there used to be armed officers protecting unarmed officers at the gate, we move to a position where unarmed officers would be left as a matter of routine unprotected.
"[This means that in] an attack such as the one that occurred an officer would be left with a spray and a baton against a large man with two knives.
"It is not an equal fight."
Nicholas Moss, counsel for the Parliamentary Authorities, said: "PC Palmer's death resulted from Masood's evil actions, full stop."
He added that any questions of "missed opportunities or steps that could have been taken" would be properly explored.
The coroner also said the inquest would be "thorough and detailed".
'The knives went up'
The inquest also heard from witnesses of the attack, including a statement from Carl Knight, who saw events unfold from the top deck of a bus.
In his statement read to the court, Mr Knight said he heard a "loud bang" that sounded like a "small explosion" or a "backfiring car", as Masood's vehicle crashed into the railings outside Parliament.
The witness then saw a pedestrian approach him to ask what was happening, but Masood replied by swearing at him, revealing the knives, and saying: "You don't want to mess with me."
Mr Knight said: "As soon as the knives went up it went from car accident to attack."
The court then heard that Mr Knight saw pedestrians running away from Masood, including a woman hugging her child and saying: "Don't kill me."
"I could hear screaming coming from downstairs [on the bus] and women's voices shouting, 'drive' and, 'let me off the bus'," he said in his statement.
Antonia Kerridge, who was working in Portcullis House - where many MPs have their offices and which overlooks Parliament - on the day of the attack, told the court that she assumed there was some kind of demonstration when she heard a crash and the sound of cheering.
But, after looking through the window, she said: "I realised the cheering sound was people screaming."
'Frenzied'
Mr Knight saw Masood break into a run to the entrance to Parliament, saying: "It was as if there were no guards on the gate."
He described a struggle between Masood and PC Palmer, saying: "They were both grabbing each other and tumbling to the floor."
He said Masood "seemed to get the better of the officer".
PC James Ross, the officer who was working in the area close to PC Palmer, told the court that a member of the public shouted to alert him to the attacker.
The officer said he saw Masood stabbing PC Palmer with such force that the blade was bending.
PC Ross tried to get out his CS spray, and when he turned round he could only see the knifeman.
"The attacker was walking towards me. He had the knives in his hands," he said.
PC Ross said he had "some kind of plan" to "try and tackle him before he got to anyone else", but Masood was then killed by armed officers.
Another witness, John Campbell, said the attacker seemed "animated and frenzied" following the stabbing, adding: "He was looking for another victim."