GEOGCS["OSGB36",
    DATUM["Ordnance_Survey_of_Great_Britain_1936",
        SPHEROID["Airy 1830",6377563.396,299.3249646],
        EXTENSION["PROJ4_GRIDS","OSTN15_NTv2_OSGBtoETRS.gsb"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4277"]]