VERTCRS["BI height",
    ENSEMBLE["British Isles height ensemble",
        MEMBER["Malin Head"],
        MEMBER["Belfast Lough"],
        MEMBER["Ordnance Datum Newlyn"],
        MEMBER["Ordnance Datum Newlyn (Offshore)"],
        MEMBER["Ordnance Datum Newlyn (Orkney Isles)"],
        MEMBER["Lerwick"],
        MEMBER["Stornoway"],
        MEMBER["Douglas"],
        MEMBER["St. Marys"],
        ENSEMBLEACCURACY[0.4]],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Spatial referencing."],
        AREA["United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland) and Northern Ireland. Ireland onshore. Isle of Man onshore."],
        BBOX[49.75,-10.85,61.01,2.01]],
    ID["EPSG",9451]]