Just looked up this remarkable gentleman on the usual wiki and discovered the following little snippet that Danny might wish to comment on in that other Prince of Threads.
In September 1943, he investigated the crash of a Vultee Vengeance flown by an experienced aviator, and found that when rolling the aircraft to the right it was possible for the pilot's movements to release his safety harness, making it impossible for him to remain in his seat and control the aircraft. Lerew designed and developed a clip to prevent a recurrence of this mishap, which was later adopted worldwide for all such harnesses.