Wellington medium bomber:
Bristol Blenheim light bomber:
Fairey Battle light bomber:
Handley Page Hamden medium bomber:
The article describes these as the "heavy bombers," and does not seperately name those it called "medium bombers." Needless to say, "heavy" bombers in 1939 were no longer considered "heavy" by 1945. Indeed, the two engine Blenheim today is called a "light bomber".
Turns out, expectations in 1939 as to just what bombers could accomplish proved quite unrealistic. As late as 1942, most bombs didn't land within miles of their targets. And, more British airmen died on bombing missions than the Germans they were trying to bomb.
Actally both the Blenheim and Battle were considered "light bombers" (c. 1000lb bombload) in 1939.
The Hampden and Wellington were "mediums" (c. 4,000lb)
The 1939 "heavy" with 7,000lb load was the Whitley
What you have here is journalistic accuracy. (little changes over the years)
Bro, do you have a source for that. I'd have to imagine that you'd kill more Germans just when the plane his the ground. That's real interesting.