The Rail Accident Investigation Branch, the appointed independent safety investigator for the UK rail network, has concluded its report into the derailment almost one year ago at Sheffield station. As a result, the RAIB has made four recommendations to Network Rail. The Branch says changes need to be made to the implementation of processes for identifying high derailment risk locations; the implementation of safety-critical changes to its processes; standards governing fitment of check rails; and track geometry data formats.