In 2017, a Rail Accident Investigation Branch report into a serious irregularity at on 29 December 2016 revealed that some of the lessons from the Clapham Junction accident appeared to have been forgotten. In that incident, a pair of redundant points had been left in an unsafe condition and undetectable by the signalling system. The alertness of a driver prevented a serious accident. Excessive working hours, cancellation of route-proving trains and lack of detailed planning were identified as contributory factors to the incident. A year later, a report into a collision at London Waterloo highlighted similar circumstances, saying that "some of the lessons