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: Bristol engineers aimed to utilize their experience with the Blenheim and Beaufort. The Type 159 was intended to be longer than the Beaufort and featured a distinctive twin-fin tail design.

: The aircraft was designed to be heavily armed with eight Hispano cannons mounted in two turrets, a configuration similar to the Boulton Paul P.92. (159).jpg

: The initial design called for Bristol Hercules engines, though the Rolls-Royce Griffon was considered a potential future substitute. : Bristol engineers aimed to utilize their experience

British B.1/39 Heavy Bomber Competition - Secret Projects Forum : The initial design called for Bristol Hercules

: Although a full-scale mock-up was completed by early 1940, the project was halted in May 1940. The onset of the Battle of Britain forced the RAF to prioritize the production of fighters over new heavy bomber prototypes, leading to the dismantling of the 159 mock-up.