Where are you?
Use your nearest station or search the London Overground network by station name or CRS.
Which train?
A tight window around now. Recent trains first, approaching trains second. Expand only when you need more.
Train
See what colleagues have already observed, then add what you saw without another unnecessary click.
Does that look right?
Flagged.
Your observation is attached to the service and can now travel with it for colleagues and Performance.