The women have never been shown a copy of the report.

"We don't know what evidence was discounted or included. We don't know what documents his team and his lawyers were shown," she said. "He's got all of our stories but we never received his right of reply.

"It was a big power imbalance. We did ask the party if there was any way we could get legal representation...Nigel said 'no, not necessary'."

The man, who Stuff cannot identify for legal reasons, is employed in the Labour Leader's Office, a unit set up to help Labour MPs with the everyday business of Parliament.

He is a public servant employed by Parliamentary Service, not the Labour Party. But Parliamentary Service can't investigate because no-one has made a complaint to them.

On Sunday, Stuff revealed Haworth barred complainants who raised concerns about alleged bullying and sexual harassment from the staffer from offices at one of Parliament's main buildings.

The woman told Labour's investigating panel that she lost confidence after the alleged attack last year.

"I went from someone so confident to so small, closed off. It was harder to defend my decisions, I became quieter... He made me weak and I hated myself for being complicit in what he did to me. 

"I would find myself crumbling down at the sight of him, I couldn't sleep, I couldn't eat."

She also criticised the party for how it handled the situation.