It was designed by Barnes Wallis...who also did bouncing bombs of dambusters and tallboy bomb.
The lattice or geodectic design is obvious in the pic and why the aircraft wasn't fully restored. The lattice gave strength but light and gave a strong internal structure. Allowing the Wimpey to survive battle damage. The Lattice structure was a Wallis trademark.
An honourable tribute to the first years of Bomber Command.