PROJCS["London_Survey_Grid",
    GEOGCS["GCS_Xrail84",
        DATUM["D_Xrail84",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["ESRI","106050"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["ESRI","104050"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",51.1666666666667],
    PARAMETER["central_meridian",-0.158333333333333],
    PARAMETER["scale_factor",0.9999999],
    PARAMETER["false_easting",78250],
    PARAMETER["false_northing",-2800],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["ESRI","102400"]]