The weapon was operated by
Royal Marine Artillery detachments of the
Naval Brigade, with one gun per battery. One gun was sent to Gallipoli but not used there. They were later transferred to the
British Army. It was used at the
Battle of the Somme in September 1916 and at the
Battle of Passchendaele, also known as the Third Battle of Ypres, in October 1917. It operated successfully where it was needed to destroy deep fortifications on the Western Front, but was limited by its relatively short range compared to other modern siege howitzers. The size and weight made it difficult to move and emplace. No further development occurred after the first batch of twelve, and instead Britain continued to develop and produce the
12-inch howitzer and
12-inch railway howitzer. ==Image gallery==