At around 12, July 10 -- of-service London Northwestern Railway passenger train derailed at Denbigh Hall South Junction on the West Coast Main Line. The derailment occurred on a switch diamond crossing at approximately 15 mph (24 km/h) as the train travelled north on the up slow line shortly after leaving Bletchley station. There were no reported injuries to the four members of staff on the train, however some lines through the junction remained out of use until 16:05 on 29 June 2025 for train recovery and infrastructure repair.

The train had earlier encountered a technical problem, while forming a southbound passenger service, making it unable to depart southwards from platform 4 at Bletchley. However, it was operational if driven north...