From the notes, it looks like it was held at the Downer yard in Porirua, which has a high amount of traffic. There is also a requirement for all staff and visitors to wear high-viz in the warehouse (which is where the photos were taken).
Aside from some operational and environmental assumptions being made in that statement, I almost guarantee they shut down operations for the period they were in there, however they also aren't in a habit of making exemptions from their PPE policy as it just leads to statements from workers like "I wasn't wearing my PPE because I couldn't see anyone operating"! Agree or disagree, but sometimes you just have to use the policy as it's written (which wasn't written with this situation in mind).