It should be noted that the statistics given are based upon the data which is held in the central statistical database and which were collected by the police at the time of the accident and subsequently reported to the Scottish Government. They may differ from any figures which the local authority would provide now, because they do not take account of any subsequent changes or corrections that local authorities may have made to the statistical information, for use at local level, about the location of each accident, based upon their knowledge of the roads and areas concerned.