Foresight is really something. In 1923, Handley Page built a naval fighter with monocoque fuselage and cantilever monoplane wing. That was the year Halifax designer Volkert started with HP. In 1937, both the Merlin and the Vulture were undeveloped engines. The Handley Page installation of the Merlin was highly flawed, causing many more problems. The eventual Lancaster Merlin engine installation format didn't occur to anyone before May, 1940, when an Amiot 356 was examined. Roy Chadwick didn't have the foresight to install tricycle undercarriage on the Tudor airliner, which was more common sense than foresight anyway, but he also didn't have the foresight to check the aileron function on a fresh Tudor II either, also, in retrospect, more a matter of common sense, and accepted practice. Four Griffon engines and tricycle undercarriage would have to wait for a development of Shackleton. OTL Lancaster development did serendipitously coincide with development of bombing practices to ensure that the correct city was hit, so earlier development may not have had the hoped for impact anyway.