"I have been involved with theatre all my life and I feel really passionate about theatre that has a meaningful purpose," says Bartley. "When a friend told me more about this incident and explained to me that there were survivors and community members who were still grieving - and that remained very raw and painful for some people - I thought, 'well, this is something I can contribute to try to help'."
Bartley first heard about the bus crash in 2012, having been asked to write a piece for Helensville's 150th anniversary celebrations. During her research, she happened across a small newspaper story about the accident and was haunted by the story. After speaking with her friend, she tracked down and spoke to survivors and whanau of those who died or were injured to discover more about the accident and its lasting effects.
"I was very aware I was telling their story so I checked in with whanau and offered to stop if they found it too painful."
However, public readings of the script as it developed during the last five years and feedback from those who went to those readings encouraged Bartley to keep writing. The tour starts this week at Te Pou Theatre in New Lynn, before going to Mangere then to various venues around Northland, loosely following the route of the original bus trip from Waitangi to Helensville.
The play is set in the present day when two teenagers discover an old man living in a derelict bus on the outskirts of Helensville. As he tells them his story, they discover a history they had never heard about.
Bartley says overall, it's about friendship, belonging and the long-term effects of silent grief.