Source : National Archives UK – WP (42) 399
In the present year the small proportion of our Air power employed offensively against Germany has destroyed Rostock, Lubeck and a large part of Cologne. It has done considerable damage to submarine resources at Hamburg, Kiel, Augsburg, Deutz, Emden and Oberhausen. It destroyed the Renault works equivalent to the fighting vehicles and transport of five Panzer Divisions. It has hit hard at Gennevilliers and the Heinkel works. It has taken very heavy toll of enemy shipping.