VERTCRS["HS2-VRF height",VDATUM["HS2 Vertical Reference Frame"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1]],USAGE[SCOPE["Engineering survey for HS2 project phases 1 and 2a."],AREA["United Kingdom (UK) - HS2 phases 1 and 2a railway corridor from London to Birmingham, Lichfield and Crewe."],BBOX[51.45,-2.75,53.3,0]],ID["EPSG",9303]]