Dr. Magnus Pyke was a scientific advisor to the British Ministry of Food during World War II. In 1969, during a lecture at the Royal Institution in London, he revealed the following:
At that time large amounts of human blood were collected from such people as were prepared to give it. The blood was centrifuged, the plasma put aside for parenteral injection into those victims of bombing that might need it, and the red corpuscles discarded.
Again the scientific advisers to the minister of food put forward a scheme to make use of the red-blood corpuscles, so self-sacrificingly contributed by patriotic donors, and manufacture from it black pudding for distribution on the food ration.
The curious anthropological phenomenon then emerged that although the British were prepared to consume each other’s blood by vein, they considred its ingestion by mouth was a variant of cannibalism and therefore disgusting.
They could have called it Soylent Black.