RAIB Report Highlights Training Gaps Following Bletchley Derailment

The Rail Accident Investigation Branch (RAIB) has published its findings into a train derailment that occurred near Bletchley, Buckinghamshire, in June 2025.

The incident took place at Denbigh Hall South Junction on 26 June at approximately 12:27, when an out-of-service train travelling at around 15mph left the tracks.

Following the launch of its investigation in July 2025, RAIB has now released a report outlining key findings and recommendations.

The investigation identified concerns around varying levels of understanding among signallers regarding diamond points, as well as inconsistencies in training when applying Rule Book procedures for authorising trains to move in the wrong direction.

RAIB also found that the existing Rule Book did not fully address the specific circumstances involved in this type of wrong-direction movement.

As a result, several recommendations have been made. Network Rail has been advised to enhance training for signallers, ensuring they are better equipped with the tools and knowledge required to plan train movements safely.

Further recommendations have been directed jointly at Network Rail and West Midlands Trains, calling for improved training focused specifically on the use and management of diamond points.

In addition, the Rail Safety and Standards Board has been asked to review whether updates to the Rule Book are needed, particularly in situations where signals are positioned close to the starting point of a planned wrong-direction movement.

The report highlights the importance of clear guidance and consistent training in maintaining safety across the rail network.