Any idea what is going on today (15th September)? At least two 2 carriage diagrams out on the North Downs line.
Only 1 short form on N Downs, the timetabled 2 car is a 2 car as planned.
As to why, it’s just a Turbo misbalance, appears Oxford had 4x 2 car and 1x 3 car overnight; rather than 5x 2 car. That leaves Reading short of a 3 car to send out in the morning, and a 2 car over.
Controller and Depot will have worked together to identify which diagram to run short, taking in a plethora of factors and arrived at that diagram being the least-worst option.