Krakatoa. The Argosy wing was, indeed, structurally and aerodynamically that of a Shackleton MK3. The top illustration is a MK3 and the lower a MK2 (and identical to a Lincoln)
AVRO (soon to become Hawker Siddeley, AVRO Whitworth Division) allocated their Type No 733 to the mainplane they designed for the AW Argosy. The Shack MK3 mainplane didn't, in fact, have a lower fatigue life than the MK2's; except when attached to a Shack MK3 Phase 3 where the extra AUW and thrust from 2 BS Vipers hammered hell out of it.
Back to Thread: scrap/destruction direct from build doesn't seem to have been a common event with Lancasters. My reference is the "Individual Histories" in Harry Holmes excellent book "AVRO Lancaster - the definitive record". Lots of cancelled contracts from "shadow factories" before construction commenced and a very few long storage at MUs (eg SW298, a MK1 FE from Armstrong Whitworth commencing May '45, on charge at 38, 32, 15 MUs, Near East, sold to scrap November '54).