EPSG:9881 — MOLDOR11 Grid + ODN height

COMPOUNDCRS[
    "MOLDOR11 Grid + ODN height",
    PROJCRS[
        "MOLDOR11 Grid",
        BASEGEOGCRS[
            "MOLDOR11-IRF",
            DATUM[
                "MOLDOR11 Intermediate Reference Frame",
                ELLIPSOID[
                    "GRS 1980",
                    6378137,
                    298.257222101,
                    LENGTHUNIT["metre",1,ID["EPSG",9001]],
                    ID["EPSG",7019]
                ],
                ID["EPSG",1315]
            ],
            DEFININGTRANSFORMATION[
                "ETRS89-GBR [OSNet v2009] to MOLDOR11-IRF (1)",
                ID["EPSG",9878]
            ],
            ID["EPSG",9871]
        ],
        CONVERSION[
            "MOLDOR11-TM",
            METHOD["Transverse Mercator",ID["EPSG",9807]],
            PARAMETER[
                "Latitude of natural origin",
                53.3500000000003,
                ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
                ID["EPSG",8801]
            ],
            PARAMETER[
                "Longitude of natural origin",
                -1.90000000000028,
                ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
                ID["EPSG",8802]
            ],
            PARAMETER[
                "Scale factor at natural origin",
                1,
                SCALEUNIT["unity",1,ID["EPSG",9201]],
                ID["EPSG",8805]
            ],
            PARAMETER[
                "False easting",
                226574.2032,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",8806]
            ],
            PARAMETER[
                "False northing",
                390894.838,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",8807]
            ],
            ID["EPSG",9879]
        ],
        CS[Cartesian,2,ID["EPSG",4400]],
        AXIS["Easting (E)",east],
        AXIS["Northing (N)",north],
        LENGTHUNIT["metre",1,ID["EPSG",9001]],
        ID["EPSG",9880]
    ],
    VERTCRS[
        "ODN height",
        VDATUM["Ordnance Datum Newlyn",ID["EPSG",5101]],
        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 height (2)",ID["EPSG",7711]],
        GEOIDMODEL["ETRS89 to ODN height (1)",ID["EPSG",10021]],
        ID["EPSG",5701]
    ],
    ID["EPSG",9881]
]

+proj=tmerc +lat_0=53.35 +lon_0=-1.9 +k=1 +x_0=226574.2032 +y_0=390894.838 +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs

proj4.defs("EPSG:9881", "+proj=tmerc +lat_0=53.35 +lon_0=-1.9 +k=1 +x_0=226574.2032 +y_0=390894.838 +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 9881,
  "name": "MOLDOR11 Grid + ODN height",
  "kind": "compound",
  "area": "UK - Manchester to Dore",
  "unit": null,
  "bbox": [
    53.25,
    -2.4,
    53.55,
    -1.39
  ],
  "proj4": "+proj=tmerc +lat_0=53.35 +lon_0=-1.9 +k=1 +x_0=226574.2032 +y_0=390894.838 +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (9881, 'EPSG', 9881, '+proj=tmerc +lat_0=53.35 +lon_0=-1.9 +k=1 +x_0=226574.2032 +y_0=390894.838 +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs', 'COMPD_CS["MOLDOR11 Grid + ODN height",PROJCS["MOLDOR11 Grid",GEOGCS["MOLDOR11-IRF",DATUM["MOLDOR11_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1315"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","9871"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",53.35],PARAMETER["central_meridian",-1.9],PARAMETER["scale_factor",1],PARAMETER["false_easting",226574.2032],PARAMETER["false_northing",390894.838],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","9880"]],VERT_CS["ODN height",VERT_DATUM["Ordnance Datum Newlyn",2005,AUTHORITY["EPSG","5101"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5701"]],AUTHORITY["EPSG","9881"]]');

PROJECTION
  "+proj=tmerc"
  "+lat_0=53.35"
  "+lon_0=-1.9"
  "+k=1"
  "+x_0=226574.2032"
  "+y_0=390894.838"
  "+ellps=GRS80"
  "+units=m"
  "+vunits=m"
  "+no_defs"
  "+type=crs"
END

9881=COMPD_CS["MOLDOR11 Grid + ODN height",PROJCS["MOLDOR11 Grid",GEOGCS["MOLDOR11-IRF",DATUM["MOLDOR11_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1315"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","9871"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",53.35],PARAMETER["central_meridian",-1.9],PARAMETER["scale_factor",1],PARAMETER["false_easting",226574.2032],PARAMETER["false_northing",390894.838],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","9880"]],VERT_CS["ODN height",VERT_DATUM["Ordnance Datum Newlyn",2005,AUTHORITY["EPSG","5101"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5701"]],AUTHORITY["EPSG","9881"]]