A convicted murderer helped wrangle terrorist killer Usman Khan to the ground on the London Bridge — but his victim’s family says he’s “absolutely not” a hero.

Inmate James Ford, 42, was on day release attending the same prison rehabilitation conference as Khan Friday when he intervened in the stabbing rampage that killed two and injured three others, The Independent reported.

He is serving a life sentence in the murder of Amanda Champion, a 21-year-old woman with learning disabilities who was found strangled and with her neck slit, the outlet reported.

“He is a murderer out on day release, which us as a family didn’t know anything about,” Champion’s aunt, Angela Cox, told the Daily Mail. “He murdered a disabled girl. He is not a hero, absolutely not.”

Champion had been missing for three weeks in July 2003 when someone discovered her body near her Kent home, according to reports.

Police didn’t have any leads in the case until a British charity worker broke a vow of anonymity and notified authorities that Ford called a hotline to confess to the slaying, the Independent reported. Ford admitted to killing Champion in court but never provided a motive.

Champion’s family has worked to block Ford’s parole and was stunned to hear that he was granted a day release.

“The police liaison officer called me saying he was on the TV,” Cox told the Daily Mail. “I am so angry. They let him out without even telling us. Any of my family could have been in London and just bumped into him.”

Cox said she was further horrified to learn that Ford was being hailed as a hero for helping subdue the knifeman.

“[The officer] said, ‘Don’t worry, it is not him that’s done anything, he’s there and he is being classed as a hero,'” the aunt said. “For him to be called a hero – he is not, he is a cold-blooded murderer.”

Following the attack, Ford was on the receiving end of much praise for confronting the 28-year-old jihadi on the bridge before he was shot dead by police.

Queen Elizabeth lauded the group who wrestled down Khan, saying she gives her “enduring thanks to the police and emergency services, as well as the brave individuals who put their own lives at risk to selflessly help and protect others.”

London Mayor Sadiq Khan also hailed the “breathtaking heroism of members of the public who literally ran towards danger not knowing what confronted him.”

With Post wires