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| | Handley Page H.P.57 Halifax |
 | | Handley Page's H.P.56 proposal was selected for prototype construction, but the company had doubts that the Vulture engine would emerge as a reliable production powerplant, and set about the task of redesigning the H.P.56 to take four Bristol Taurus engines, but this was soon changed to incorporate Rolls-Royce Merlins instead. |
 | | The Halifax, however, scored over the Lancaster in its multi-rolecapability, for in addition to its deployment as a heavy night-bomber, it was equally at home when employed as an ambulance, freighter, glider tug, personnel transport and maritime reconnaissance aircraft. |
 | | On 3 September 1937 Handley Page was awarded a contract for the manufacture of two prototypes of the H.P.57, with construction beginning in early 1938. |
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