In preparation for his models, Ough drew meticulous plans of the ships, their weapons, fittings and boats, many of which are regarded as the most authoritative drawings of their subjects in existence. For years these plans were marketed through the David MacGregor Plans Service and after Ough's death in 1965 his plans became the sole property of David MacGregor. On MacGregor's death in 2003 the combined collection was bequeathed to the SS Great Britain Trust.