Scarlett Hanna, daughter of the president of the Church of Scientology in Australia, has spoken negatively about the organisation, saying it is toxic and tears families apart.

In an interview with Steve Cannane on Lateline, Hanna said that Scientology is toxic and those who have grown up in the church are 'damaged'.

According to her, children's communications with their parents were cut and they were under communal living, with 25 children staying in a single roof. They were given only 20 minutes every night to spend with their parents.

"The best way I can describe it is cattle. We were property of the organisation. Although they would like to say that we weren't, we were," Hanna said.

Being part of the so-called 'Cadet Org', she grew up lonely, without anyone talking to or looking after her. The Cadet Org is composed of children whose parents are members of Sea Org, Scientology's elite unit.

Hanna added that the 25 children living in a unit is being taken care of by one nanny.

Sheila Huber, former executive establishment officer at the Church of Scientology in Los Angeles, said that the church didn't believe that parents were good for children.

At the age of 16, Huber signed up to the Sea Org and her first job was as a nanny.

"I couldn't believe it. It was wall-to-wall cribs. There were just under 30 children and they were under my sole care. I had no training," Huber said.

"I had never really spent much time babysitting young ones like that and they were all under the age of three-years-old."

Huber says that the children were never allowed to go outside. In eight months, they were only able to go out once, and it even took three months to get that approved.

"Sorry, it's hard. We took them in a van, the children, and took them to the park and they spent so much time in their cribs, day after day, night after night, that they wouldn't go in any space larger than the size of their cribs.

"They were terrified. They were terrified of sunlight," Huber adds.

Church of Scientology member Sarah McLintock denied all allegations of Hanna.

"What I experienced with Scarlett is she was a very good friend of mine. I grew up with her. And what she is saying, I did not experience, so I don't know where she's coming from with such things," McLintock said.

"It really doesn't make any sense to me because I grew up with her. I was there with her and I think people are giving her things to say, personally."

Around eight years ago, the Cadet Org was disbanded, following the ban on Sea Org members from having children.

Despite the traumatic experiences that Hanna has gone through, she doesn't blame her parents.

She said, "I think they're part of the organisation, they were part of the machine. I think the church had some very toxic ways of managing its staff and their children and I definitely blame the church as an organisation, not my parents at all."

"I just think that the church needs to take some accountability for, you know, what it was involved in. Maybe apologise to some of these people that have had such traumatising experiences."

Hanna's parents, Vicki Dunstan, president of the Scientology church in Australia, and Mark Hanna, former director of public affairs, refused to be interviewed for this story.