PROJCRS["OSGB36 / Heathrow Airport GIS Grid 2026",BASEGEOGCRS["OSGB36",DATUM["Ordnance Survey of Great Britain 1936",ELLIPSOID["Airy 1830",6377563.396,299.3249646,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4277]],CONVERSION["Heathrow Airport GIS Grid 2026",METHOD["Local Orthographic",ID["EPSG",1130]],PARAMETER["Latitude of projection centre",51.4701102238889,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8811]],PARAMETER["Longitude of projection centre",-0.451656585555556,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8812]],PARAMETER["Azimuth at projection centre",359.700932272222,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8813]],PARAMETER["Scale factor at projection centre",1.000002816,SCALEUNIT["unity",1],ID["EPSG",8815]],PARAMETER["Easting at projection centre",7334.818,LENGTHUNIT["metre",1],ID["EPSG",8816]],PARAMETER["Northing at projection centre",5637.421,LENGTHUNIT["metre",1],ID["EPSG",8817]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["GIS."],AREA["UK - Heathrow airport and surrounding area."],BBOX[51.42,-0.56,51.52,-0.37]],ID["EPSG",11390]]