On the morning of 26 October 2022, a signal at Wingfield in Derbyshire (which had been disconnected and reconnected the previous night as part of planned track maintenance work) was returned to service with a fault. This fault caused a wrong side failure, with the signal's red and yellow aspects being displayed incorrectly.
The fault initially caused a train to pass the signal at danger, which stopped in the track section beyond the signal. It later resulted in a second train being signalled at caution into the track section where the first train was still stopped. The second train was running at slow speed and being driven at caution, and came to a stop 75 metres from the first train. No damage or injury was caused by the incident.
We have undertaken a preliminary examination into the circumstances surrounding this incident. Having assessed the evidence which has been gathered to date, we have decided to publish a safety digest.
The safety digest will be made available on our website in the near future.
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