SW1A 2EG is a postalcode and its consensus geometry is derived from os.
{"os:positional_quality_indicator":"1","mz:is_ceased":0,"wof:created":1583701149,"date:inception_upper":"2002-08-01","geom:latitude":51.506252,"wof:name":"SW1A 2EG","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633159,"empire_id":136253055,"postalcode_id":487748883,"postalregion_id":1864210853}],"mz:is_deprecated":0,"geom:area":0,"geom:longitude":-0.127371,"date:inception_inner_start":1028160000,"wof:id":487748883,"os:county_code":"E99999999","counts:concordances_total":1,"date:inception_inner_end":1028246399,"geom:type":"Point","wof:lastmodified":1709396328,"date:inception_outer_end":1028246399,"wof:belongsto":[85633159,102191581,136253055,1864210853],"wof:concordances":{"gp:id":"28005851"},"wof:repo":"whosonfirst-data-postalcode-gb","date:inception_lower":"2002-08-01","src:geom":"os","wof:country":"GB","counts:names_preferred":0,"geom:area_square_m":0,"os:region_code":"E12000007","wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"2002-08-01","iso:country":"GB","counts:names_languages":0,"geom:bbox":"-0.127371,51.506252,-0.127371,51.506252","os:country_code":"E92000001","date:inception_outer_start":1028160000,"wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"3b1649efc0458c6b9396d05dc5e2ed0f","wof:parent_id":1864210853,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"","os:district_code":"E09000033"}