OS Open Roads is available in the following formats:
Geography Markup Language (GML): A vector dataset in GML version 3.2.1 Simple Features Profile – Level 1.
Shapefile: A national vector dataset in ESRI shapefile (.shp).
GeoPackage: A national vector GeoPackage file (.gpkg).
Vector tiles: A national vector tiles file (MBTiles).
OS Open Roads is supplied as an online download and is available from the OS Data Hub Open Roads download page. You can select a data format during the download process.