EPSG:5746 — Stornoway height

VERTCRS[
    "Stornoway height",
    VDATUM["Stornoway",ID["EPSG",5144]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    GEOIDMODEL["ETRS89-GBR [OSNet v2009] to Stornoway height (2)",ID["EPSG",7715]],
    GEOIDMODEL["ETRS89 to Stornoway height (1)",ID["EPSG",10033]],
    ID["EPSG",5746]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:5746", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5746,
  "name": "Stornoway height",
  "kind": "vertical",
  "area": "UK - Outer Hebrides onshore",
  "unit": "metre",
  "bbox": [
    56.76,
    -7.72,
    58.54,
    -6.1
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5746, 'EPSG', 5746, '+vunits=m +no_defs +type=crs', 'VERT_CS["Stornoway height",VERT_DATUM["Stornoway",2005,AUTHORITY["EPSG","5144"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5746"]]');

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

5746=VERT_CS["Stornoway height",VERT_DATUM["Stornoway",2005,AUTHORITY["EPSG","5144"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5746"]]