9.45 inch Heavy Mortar

The ML 9.45 inch heavy trench mortar, nicknamed the "Flying Pig", was a large calibre mortar of World War I and the standard British heavy mortar from the autumn of 1916. It was a modification of an original French design, the Mortier de 240 mm developed by Batignolles Company of Paris and introduced in 1915. Britain manufactured the modified version under licence.