COMPD_CS["London Survey Grid 2025",PROJCS["Xrail84 / London Survey Grid TM",GEOGCS["Xrail84",DATUM["Xrail84",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","1408"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","10993"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",51.1666666666667],PARAMETER["central_meridian",-0.158333333333333],PARAMETER["scale_factor",0.9999999],PARAMETER["false_easting",78250],PARAMETER["false_northing",-2800],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","10995"]],VERT_CS["London Survey Grid height",VERT_DATUM["London Survey Grid height datum",2005,AUTHORITY["EPSG","1423"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","10989"]],AUTHORITY["EPSG","11006"]]