What does it mean if you see a pedestrian wearing reflective clothing and carrying a red light at night?

Explanation: A pedestrian wearing reflective clothing and carrying a red light at night signals they're part of an organised walk. Be aware that there will likely be more pedestrians with them. They should be on the left and all wearing light or reflective clothing, but be aware they could be on the wrong side of the road or wearing dark clothing, and may be hard to see. If they're facing away from you, they might not hear you approach.

Category: Vulnerable road users