text: The incident was investigated by track owner Network Rail (NR), the Office of Rail Regulation and the Rail Accident Investigation Branch (RAIB). The RAIB launched an investigation into the incident on 27 March, releasing a statement in which they described the incident as a "dangerous occurrence". According to the RAIB, the incident was caused by driver error, after the traincrew isolated the Automatic Warning System and Train Protection & Warning System on approach to a temporary speed restriction in the area of line immediately after signal SN43, the signal before signal SN45. These were not reinstated on approach to signal SN45; as a result, the train was not automatically stopped by the safety systems as it passed the signal at danger.  down the line, the train was manually brought to a stop by the driver; it came to a rest across Wootton Bassett Junction.
  WCR and NR met on 30 March 2015. NR subsequently expressed the view that at that meeting "WCR demonstrated that its controls, communication and commitment following the recent SPAD were inadequate" and that since then "the response by the senior management of WCR to the issues raised" had been "inadequate", suspending WCR's operator's licence effective from midnight 3 April 2015. Previously operators had been banned from certain routes, but this was a total network ban unprecedented since privatisation. The suspension notice states:
  WCR stated that it was in negotiations with NR regarding the terms of the suspension, and also with other train operating companies in order to prevent the cancellation of many scheduled WCR operated railtours during the period of suspension.
  On 8 May 2015, Network Rail lifted the track access ban off the company. This meant that the company could continue its scheduled tours for the coming months including the first of the Jacobite railtours.