Based upon talks from the conference, the Air Ministry quickly formalised Specification B.28/35 for prototypes of a bomber version; the "Type 142M" (M for military). One principal change between the "Type 142M" bomber and its "Type 142" predecessor was the repositioning of the wing from a low-wing to a mid-wing position, which allowed for more internal space within the fuselage underneath the main spar to accommodate a sizable bomb bay. Other modifications included the addition of a bomb-aimer's position and a Browning machine gun in the nose along with provisions for a semi-retractable gun turret in the dorsal position.