of thrust. The Ministry of Aircraft Production (MAP) representative expressed doubts regarding the lack of detail, estimations for the aircraft's performance and optimistic structure weight; the project received permission to proceed in July 1941.

The DH.99 design was soon modified to incorporate a combined wood-and-metal construction in light of recommendations from the MAP; the design was thus renumbered to DH.100 by November 1941. The aircraft was considered to be a largely experimental