ðə fˈaɪnəl klˈoʊʒɚɹ ʌvðə ɡˈeɪts, ænd ðɪ ˈɛksədəs ʌvðə lˈæst fˈaɪv stˈæf mˈɛmbɚz, tˈʊk plˈeɪs ˌɔn ˈeɪtiːn ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv.
The final closure of the gates, and the exodus of the last five staff members, took place on 18 April 1975.