Disgust, the gag reflex and flights to the vomitorium greeted this week's news that horse flesh had breached the beef wall to contaminate burgers and frozen beef meals (lasagna, spaghetti Bolognese, shepherd's pie, meatballs) all over Europe. Some of the "beef" products contained 100 percent horsemeat, and early forensic tests hinted that the contamination might go back as far as August 2012.