COMPOUNDCRS["RBEPP12 Grid + ODN height",
    PROJCRS["RBEPP12 Grid",
        BASEGEOGCRS["RBEPP12-IRF",
            DATUM["RBEPP12 Intermediate Reference Frame",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            ID["EPSG",10277]],
        CONVERSION["RBEPP12-LCC",
            METHOD["Lambert Conic Conformal (2SP)",
                ID["EPSG",9802]],
            PARAMETER["Latitude of false origin",50.85,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8821]],
            PARAMETER["Longitude of false origin",-3.25,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8822]],
            PARAMETER["Latitude of 1st standard parallel",50.3,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8823]],
            PARAMETER["Latitude of 2nd standard parallel",51.45,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8824]],
            PARAMETER["Easting at false origin",372382.8292,
                LENGTHUNIT["metre",1],
                ID["EPSG",8826]],
            PARAMETER["Northing at false origin",217764.7796,
                LENGTHUNIT["metre",1],
                ID["EPSG",8827]]],
        CS[Cartesian,2],
            AXIS["(E)",east,
                ORDER[1],
                LENGTHUNIT["metre",1]],
            AXIS["(N)",north,
                ORDER[2],
                LENGTHUNIT["metre",1]]],
    VERTCRS["ODN height",
        VDATUM["Ordnance Datum Newlyn"],
        CS[vertical,1],
            AXIS["gravity-related height (H)",up,
                LENGTHUNIT["metre",1]]],
    USAGE[
        SCOPE["Engineering survey and topographic mapping for railway applications."],
        AREA["United Kingdom (UK) - on or related to the rail route from Reading via Newbury to Penzance."],
        BBOX[50.05,-5.63,51.71,-0.85]],
    ID["EPSG",10281]]