{"geometry":{"type":"MultiPolygon","coordinates":[[[[-2.232926,53.475275],[-2.232988,53.475367],[-2.233037,53.475356],[-2.233007,53.475313],[-2.232969,53.475254],[-2.233001,53.475243],[-2.233057,53.475215],[-2.233081,53.475201],[-2.233107,53.475183],[-2.233129,53.475164],[-2.233098,53.475154],[-2.233089,53.47516],[-2.233063,53.475159],[-2.233039,53.47516],[-2.233004,53.475164],[-2.232934,53.475176],[-2.232867,53.47519],[-2.232839,53.475197],[-2.232793,53.475212],[-2.232757,53.475226],[-2.232718,53.475246],[-2.232712,53.475246],[-2.232704,53.475265],[-2.232798,53.475274],[-2.232869,53.475273],[-2.232921,53.475268],[-2.232926,53.475275]]]]},"type":"Feature","properties":{"entry-date":"2026-09-02","start-date":"2024-10-10","end-date":"2029-10-09","entity":2300314,"name":"Butterfly Stairs and Walkway Bridge (formerly known as The Sir Hubert Worthington Stair), UMIST, Manchester","dataset":"certificate-of-immunity","typology":"geography","reference":"1491350","prefix":"certificate-of-immunity","organisation-entity":16,"quality":"authoritative","documentation-url":"https://historicengland.org.uk/listing/the-list/list-entry/1491350"}}