In an interview with the BBC's Panorama, Ms Lucas told the programme how she was able to get herself and several children out of the room, despite suffering stab wounds to her spine, head, ribs, lung and shoulder blade.
New Merseyside Police footage in the BBC's Panorama programme The Southport Killer shows a member of the public leading a male officer to the building on Hart Street.
I just don't know what else I could've done ... You just don't feel brave when you're the adult ... "The police said we'd all be dead if me and Heidi hadn't done what we'd done, and that gives nothing for like the children who did die.
Fourteen-year-old Sarah - a fellow survivor whose identity is protected by a court order - also spoke to Panorama, telling the BBC of how she managed to fight through serious injury to lead several of the children to safety.
It comes as a yoga teacher who was repeatedly stabbed has described helping several children to run to safety adding she felt she had to survive in order to save those in her class.
