The chief inspector of railway accidents has warned that the low-speed collision between a passenger train and wagons at London Waterloo last summer has revealed ‘a deep-seated problem’. Simon French of the Rail Accident Investigation Branch said the incident on 15 August, which involved an early morning train and stationary engineering wagons, has aroused fears that the lessons of the fatal triple collision near Clapham Junction on 12 December 1988 ‘may be fading from the railway industry’s collective memory’. Both accidents were caused by wrongly-wired signals.