Based on his Comet racer, the mosquito was built from wood composite because metal was in short supply. This wasn't De Havilland's first wooden aircraft.
Originally the pilot had a harness and the navigator a waist belt. They changed to harnesses because of the belt's low crash survival rate.
The navigator would be thrown forward and smack their head on the panel.
Also found mozzies built in Canada would delaminate in the Far East as they used a different bond than in the UK, which did not stand up to the warm, damp climate.
Actually, your photograph shows Geoffrey de Havilland Jnr (not his father). This son was the company's Chief Test Pilot, and was killed postwar in the crash of one of the experimental jet DH 108 Swallow aircraft
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Originally the pilot had a harness and the navigator a waist belt. They changed to harnesses because of the belt's low crash survival rate.
Also found mozzies built in Canada would delaminate in the Far East as they used a different bond than in the UK, which did not stand up to the warm, damp climate.