COMPOUNDCRS["MWC18 Grid + ODN height",
    PROJCRS["MWC18 Grid",
        BASEGEOGCRS["MWC18-IRF",
            DATUM["MWC18 Intermediate Reference Frame",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            ID["EPSG",20033]],
        CONVERSION["MWC18-TM",
            METHOD["Transverse Mercator",
                ID["EPSG",9807]],
            PARAMETER["Latitude of natural origin",53.35,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8801]],
            PARAMETER["Longitude of natural origin",-2.55,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8802]],
            PARAMETER["Scale factor at natural origin",1,
                SCALEUNIT["unity",1],
                ID["EPSG",8805]],
            PARAMETER["False easting",171975.9382,
                LENGTHUNIT["metre",1],
                ID["EPSG",8806]],
            PARAMETER["False northing",116744.6938,
                LENGTHUNIT["metre",1],
                ID["EPSG",8807]]],
        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 Manchester via Wigan and Liverpool to Chester."],
        BBOX[53.09,-3.15,53.65,-2.1]],
    ID["EPSG",20003]]