Avro 683 Lancaster was the best British WWII heavy bomber. Double-engine Manchester aircraft served as its prototype. The aircraft conducted its first flight on Jan 9th, 1941. The new bomber was approved, and soon after, the first orders for its production were received. In total 7377 aircraft in various modifications were built.
The squadrons of 59 bombing units were equipped with Lancasters. During the war, they have conducted over 156000 flights and have released 618350 tons demolition bombs and over 51 mln incendiary bombs. Some bombers were re-equipped into cargo aircraft.