Ingrid Loyau-Kennet calmly talked to the soldier’s murderers, distracting them from the fact that they were slowly being surrounded by police. The two men were subsequently shot, and then taken into custody.

Source: telegraph.co.uk

Being a cub leader I have my first aid so when I saw this guy on the floor I thought it was an accident then I saw the guy was dead and I could not feel any pulse.
And then when I went up there was this black guy with a revolver and a kitchen knife, he had what looked like butcher's tools and he had a little axe, to cut the bones, and two large knives and he said 'move off the body'.
So I thought 'OK, I don't know what is going on here' and he was covered with blood. I thought I had better start talking to him before he starts attacking somebody else. I thought these people usually have a message so I said 'what do you want?'
I asked him if he did it and he said yes and I said why? And he said because he has killed Muslim people in Muslim countries, he said he was a British soldier and I said really and he said 'I killed him because he killed Muslims and I am fed up with people killing Muslims in Afghanistan they have nothing to do there.
I started to talk to him and I started to notice more weapons and the guy behind him with more weapons as well. By then, people had started to gather around. So I thought OK, I should keep him talking to me before he noticed everything around him.
He was not high, he was not on drugs, he was not an alcoholic or drunk, he was just distressed, upset. He was in full control of his decisions and ready to everything he wanted to do.
I said 'right now it is only you versus many people, you are going to lose, what would you like to do?' and he said I would like to stay and fight.
The other one was much shier and I went to him and I said 'well, what about you? Would you like to give me what you have in your hands?' I did not want to say weapons but I thought it was better having them aimed on one person like me rather than everybody there, children were starting to leave school as well.