The trust that has built up between the sex workers and the Night Light team has been key to its success.
As well as talking to them about children they have seen on the streets and dangerous offenders, they also offer the women support, food, clothing and a supportive ear.
Rose said that since the project started five years ago, they have seen huge progress.
"We're getting a massive increase in the women sharing about their own experiences of being sexually assaulted, as well as worries about children," she said.
"It isn't rocket science. It is just investing that time in building those relationships."
Because many of the women have been sexually assaulted themselves, they are keen to prevent young people from going through similar experiences, Jo said.
"Time and time again, we hear them say, 'I wish this had been running when I was a kid, because perhaps I wouldn't be out here now'," she added.
"I think they're probably the most passionate advocates… they really don't want to see children on the streets."
Megan, 34, doesn't want to be working on Bristol's streets for long, but while she is, she said she is proud to have helped safeguard other girls.
"The underage thing is something I really feel strongly about," she said.
"There's a bad stigma about sex workers, drugs… but we're not bad people."
'Highest risk children'
Night Light is proving so successful in Bristol, that other parts of the country are now looking to roll the project out.
And Rose and Jo are both very clear, Night Light would not exist without the women, and hope it helps to challenge the narrative around street sex workers.
"They're incredible," Jo said.
"We are totally dependent on them. We've identified children at risk, who are out on the streets, who we weren't aware of, because of them.
"And that's really one of the key things about Night Light, the children they are pointing us towards are probably some of the highest risk children, but yet they are often really hidden."
