EPSG:5740 — ODN Orkney height

VERTCRS[
    "ODN Orkney height",
    VDATUM["Ordnance Datum Newlyn (Orkney Isles)",ID["EPSG",5138]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    GEOIDMODEL[
        "ETRS89-GBR [OSNet v2009] to ODN Orkney height (2)",
        ID["EPSG",7712]
    ],
    GEOIDMODEL["ETRS89 to ODN Orkney height (1)",ID["EPSG",10029]],
    ID["EPSG",5740]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:5740", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5740,
  "name": "ODN Orkney height",
  "kind": "vertical",
  "area": "UK - Orkney Islands onshore",
  "unit": "metre",
  "bbox": [
    58.72,
    -3.48,
    59.41,
    -2.34
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5740, 'EPSG', 5740, '+vunits=m +no_defs +type=crs', 'VERT_CS["ODN Orkney height",VERT_DATUM["Ordnance Datum Newlyn (Orkney Isles)",2005,AUTHORITY["EPSG","5138"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5740"]]');

PROJECTION
  "+vunits=m"
  "+no_defs"
  "+type=crs"
END

5740=VERT_CS["ODN Orkney height",VERT_DATUM["Ordnance Datum Newlyn (Orkney Isles)",2005,AUTHORITY["EPSG","5138"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5740"]]