Overspeeding incident at Grantham South Junction, Lincolnshire, 26 September 2025.
At around 09:20 on 26 September 2025, train reporting number 1Y80, the 07:08 Middlesborough to London Kings Cross service, operated by London North Eastern Railway (LNER), was involved in an overspeeding incident at Grantham South Junction.
The train was routed over diverging points with a permanent speed restriction of 25 mph (40 km/h). The associated signals displayed the expected indications; however, the train traversed the points at 56 mph (90 km/h). The permissible speed in this area for a train which remains on the main line is 115 mph (184 km/h).
This caused the train to lurch sideways and passengers on board reported to LNER through social media that they received minor injuries. Later, follow-up enquiries led to the seriousness of the event being understood.
We have undertaken a preliminary examination and reviewed a similar incident at this location and two previous investigations into similar overspeeding events that occurred at Spital Junction, Peterborough on 17 April 2022 ( report 06/2023 ) and 4 May 2023 ( report 10/2024 ). As the previous investigations still have open recommendations, RAIB has decided to publish a safety digest for this incident.
The safety digest will be made available on our website in the next few weeks.
