Definition: Ecclesiastical Building
~ Anglican, free churches and Roman Catholic churches;
~ Now vacant buildings which were used as churches and have never had any other use.
Attorney General, ex rel Bedfordshire CC v Howard United Reformed Church Trustees, Bedford, 1976  QB 332,  3 All ER 878
Does not include a building used or awaitable for use my a minister of religion wholly or mainly as a residence from which to perform the duties of his office.