{"geometry":{"type":"Point","coordinates":[-0.298561,51.412911]},"type":"Feature","properties":{"entry-date":"2026-10-03","start-date":"1999-04-26","end-date":"","entity":31842421,"name":"Former Hawker Aircraft Experimental Shop, Siddeley House","dataset":"listed-building","typology":"geography","reference":"1386815","prefix":"listed-building","organisation-entity":16,"quality":"authoritative","documentation-url":"https://historicengland.org.uk/listing/the-list/list-entry/1386815","listed-building-grade":"II"}}