Just bought this £4.99 on amazon on the recommedation of a friend. This is the story of the Australian No 1 Tunneling Company's actions in 1917. The story is based on the life of Captain Oliver Woodward, a mining enginner and explosive expert.
Like most Australian films on the Great War, it isn't recommended for family viewing, but is acurate and well made. The story is underplayed, no histrionics or blood and glory set pices but the action sequences are far superior to Hollywood output. Unusally the story also gives quite a lot of weight to the German point of view. Well worth a fiver.