One of the heroes who battled the London Bridge attacker was knifed five times — but still battled the terrorist “until the end,” according to a new report.

Lukasz Koczocik, a worker at the Fishmongers Hall, where Cambridge University was hosting a prison rehabilitation conference Friday, was cleaning glasses in the basement when he heard people screaming — and ran into the fray, the Telegraph reported.

Media reports initially indicated that Koczocik was the man seen in photos battling attacker Usman Khan with a narwhal tusk on the London Bridge, but that was, in fact, another person, the Independent reported.

But his role was similarly heroic, according to Fishmongers’ Hall chief executive Toby Williamson.

“The scream was so loud that as a first aider, he makes a choice,” Williamson told “BBC Breakfast” Monday. “He goes toward the trouble. Lukasz gets there on the first floor of the building just behind me and it’s pretty clear that there’s a bad guy.”

“Khan’s got two knives in his hands, there’s blood, there’s screams, there’s chaos,” Williamson continued. “Lukasz pulls off the wall this long stick, he charges towards the bad guy and he impacts him on the chest, and there’s clearly something here that is protective, and it doesn’t make any sort of impact.”

But Koczocik kept buying time for others to escape, according to Williamson.

“At that point he’s got about a one-minute, one-on-one straight combat,” the executive said. “[Khan] works his way up Lukasz’s pole slashing with his knife and [Lukasz] takes five wounds to his left side, and is going to lose some strength on that side.”

Then two other men linked to the charity — one who grabbed a fire extinguisher and another who ripped a narwhal tusk off the wall — jumped into the fray.

“I think the terrorist decided he was outnumbered,” Williamson continued.

Still, Khan tried to escape through the reception hall, and the wounded Koczocik “led the charge” to stop him, according to Williamson.

“The doors opened, out the terrorist falls and the first one after him is Lukasz, shouting at everyone to get out of the way, get back,” he added.

Khan was tackled to the ground by a group of bystanders on London Bridge before being shot by responding authorities.

Poland’s justice minister, Zbigniew Ziobro, has requested that the country’s president, Andrzej Duda, award Koczocik its highest medal for “sacrifice and courage,” his spokesperson told the Independent.