SELECT location FROM table_name_46 WHERE date_of_demolition = 1940 AND church_name = "christ church greyfriars"
Apa lokasi yang memiliki tanggal pembongkaran tahun 1940 dan memiliki gereja bernama Christ Church Greyfriars?
CREATE TABLE table_name_46 (location VARCHAR, date_of_demolition VARCHAR, church_name VARCHAR)