New evidence allowed...

I think it is about the tunnel collapse incident.

A report here had described the incident well...

'2005 a section of the roof of the Lane Cove Tunnel collapsed, an unravelling failure ensued and the collapse propagated through a height of 17m to the surface forming a sinkhole that undermined the front section of Kerslake Apartments (Figure 1). The collapse occurred during the final excavation stages of the intersection of a ventilation tunnel and the exit ramp to the Pacific Highway'

https://www.lawyerly.com.au/new-evidence-allowed-in-300m-lawsuit-over-defective-lane-cove-tunnel-construction/