He had just gone to work when he heard screams and attacked the first attacker before being attacked.
The British transport police officer temporarily lost his sight and suffered serious injuries to his head, legs and hands, and spent weeks in the hospital before undergoing intensive rehabilitation for months.
Speaking exclusively with the Daily Express, he said: "It was an instinctive reaction: I saw people in trouble, in grave danger and I knew that if I did nothing, people would have died in front of me and, fortunately, I simply made the right decision. my sleeves and go to battle and basically hold until the cavalry came. "
When asked if he would do the same again, he said: "I would like to say yes, but the truth is that I will probably have images of my other half and my family that tell me, do not you dare to do that again & # 39;
"It's in my blood, I can not help people, it's not in my nature, I'd like to say yes, but I hope the rays do not hit twice and I'll never have to make the decision again, God willing."
"But I thank God for giving me a second chance in life and I try to take it with both hands and keep making everyone, my family, the country, the other victims and the services feel proud of me and lead me in consequence.
"I just try to be realistic and honest about the situation, for me, personally, it was a tragic situation in which I participated in which people lost their lives and I could not help or save everyone, but me and my colleagues did what That He could with what was in front of us. "
PC Marques, born in Birmingham, remembers taking his baton with his right hand and extending it before breathing deeply and carrying the first attacker and swinging as hard as he could.
He heard a scream before being hit so hard that he went blind in his right eye. In a matter of seconds, the terrorists Youssef Zaghba, Khuram Butt and Rachid Redouane, who were then shot dead, confronted him shouting "Allahu Akbar, Allahu Akbar" (God is great).
In an act of bravery that saw him receive the medal of George of the Queen, he tried to contain them but was very badly cut.
When a colleague sent a radio message saying "fallen officer", PC Marques told him: "Go find them, you have to go look for them". Going in and out of consciousness, he asked for a message to go to his family.
The hero is back at work three days a week in office duties, but the appeal of the front line could see him return to service sooner than expected.
He added: "I'll just take a look and see what the future holds.
"I'll make the right decision, only time will tell."