The really interesting thing about this prescient story is that in 1939, it was pretty much propaganda by the British since Hitler did not ramp up the big killing camps until after 1942 (following the Wansee conference)
While the Death camps didn’t appear until the war [Auschwitz started as a concentration camp, and became the only hybird Concentration-Death camp in the system], the concentration camp system led to a number of deaths [I believe it was at Dachau that a sign on the fence abjured the guards not to shoot the prisoners because bullets caused three pfennigs each]. Mauthausen was notorious for inmate deaths.
Dachau was called the ‘model’ camp, because that was where Theodor Eicke worked out the rules, regulations and system subsequently used at ALL the camps. One wof his prime requirements that the guards treat the prisoners with systematized [as opposed to sadistic] brutality.