COMPD_CS["HS2 Survey Grid + HS2-VRF height",
    PROJCS["HS2 Survey Grid",
        GEOGCS["HS2-IRF",
            DATUM["HS2_Intermediate_Reference_Frame",
                SPHEROID["GRS 1980",6378137,298.257222101,
                    AUTHORITY["EPSG","7019"]],
                AUTHORITY["EPSG","1264"]],
            PRIMEM["Greenwich",0,
                AUTHORITY["EPSG","8901"]],
            UNIT["degree",0.0174532925199433,
                AUTHORITY["EPSG","9122"]],
            AUTHORITY["EPSG","9299"]],
        PROJECTION["Transverse_Mercator"],
        PARAMETER["latitude_of_origin",52.3],
        PARAMETER["central_meridian",-1.5],
        PARAMETER["scale_factor",1],
        PARAMETER["false_easting",198873.0046],
        PARAMETER["false_northing",375064.3871],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Easting",EAST],
        AXIS["Northing",NORTH],
        AUTHORITY["EPSG","9300"]],
    VERT_CS["HS2-VRF height",
        VERT_DATUM["HS2 Vertical Reference Frame",2005,
            AUTHORITY["EPSG","1265"]],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Gravity-related height",UP],
        AUTHORITY["EPSG","9303"]],
    AUTHORITY["EPSG","9306"]]