We follow the UK Statistics Authority Code of Practice for Official Statistics. The code requires us to publish a revisions policy which explains the nature and extent of revisions.
Since revisions are a normal and inevitable part of statistical publications, our revision policy will allow you to acknowledge and plan for the revisions accordingly.
- Revisions log for ORR statistics (Excel format) XLSX, 67 Kb
- Revisions log for ORR statistics (OpenDocument Spreadsheet format) ODS, 64 Kb
- Our statement on revisions and errors PDF, 45 Kb
National Rail Trends – Public Performance Measure (PPM) Revisions Paper
- Download the Revisions paper PDF, 131 Kb