Boxing coach Tony Davis has spoken of his attempts to save the life of policeman Keith Palmer killed in Wednesday's terror attack in Westminster.
The 42-year-old -- a former soldier -- leapt over a fence and rushed to the scene to assist police amid the unfolding chaos. His intentions quickly turned to treating PC Palmer, who had sustained what were to prove fatal injuries.
"We had just attended a PR event at the Houses of Parliament and as we were leaving we could just see straight in front of us, on the outside of the perimeter fence, a bit of a fracas," Davis told PA Sport.
"It was loud volume, but I didn't think much of it. I thought it must be a student demonstration but then the mood changed as I saw someone come through the gate with knives above his head and start attacking the police officers.
"When I saw that, I jumped over what was maybe a four-foot fence to try to give assistance, but a lot of things happened in a few seconds.
"As the assailant was advancing he got taken out by one of the police marksmen. Then I just tended to Keith Palmer, who was collapsing on the floor.
"I started giving general first aid, trying to stop his bleeding. He had three wounds -- one to his head, one to his arm and one to the side of his ribs. I tried to stem the blood flow.
"I was calling, shouting commands, to get an ambulance or medics. People started to crowd around and give support.
"What went through my mind was just, 'Get there and give assistance'. I've got a military background and you just deal with the situation. The main issue was to try to preserve life. He was losing a lot of blood.
"We're devastated he didn't pull through, even with the additional support. There were some graphic scenes there, too graphic to publicise but everyone did all they could for him. It was just devastating."
Davis was one of the first on the scene but quickly received support from other onlookers, including MP Tobias Ellwood.
Davis, of County Durham, added: "As we were leaving I was just taking a bit of video to put on social media and say what a brilliant trip to the House of Commons we had just had.
"When I jumped over the fence I put my phone in my pocket but it was still recording. It recorded everything until it ran out of battery. You could hear everything.
"A minute-and-a-half in was when a guy called Mike came in and three-and-a-half minutes in is when Tobias came in and started taking over CPR."
The Lionhearts team included Rio Olympians Muhammad Ali and Pat McCormack as well as the super-heavyweight fighter Frazer Clarke.
The group, who were interviewed by police as witnesses, vowed that their World Series of Boxing match against Italia Thunder at York Hall on Thursday should go ahead as planned.
Davis said: "The boxers have been a concern because to witness something as graphic as that and then get put in a lockdown [while police interviews took place], would probably have an effect on them in a couple of days.
"But we made a decision to show a bit of solidarity and make sure the event went ahead tonight. I think the Lionhearts are upbeat and very much looking forward to the event."
Davis, who served in the Royal Regiment of Fusiliers and left the Army after 22 years' service last year, admits talking about the incident has probably helped him deal with it. He has given a series of interviews to various media outlets in which he has stressed he does not consider himself a hero.
He said: "You just couldn't comprehend what was about to happen as we left those doors.
"The interviews have probably been one of the coping mechanisms.
"I am okay. We are here to do a job and we have got a boxing event in a couple of hours.
"People are saying you did this and that, but I think anybody would have done it. I was maybe just a little bit quicker in reacting to it. I just thought it was the right thing to do."