My butler tells me that he has spoken with the kitchen staff who maintain that the original product was Argentinian. Leftovers from the immense slaughterhouses boiled the beef until all that remained was a sticky substance sold as `beef extract´. This was popular but expensive so that manufacturers in the Midlands came up with a cheap substitute made out of yeast. This is now sold as Bovril, Marmite, Vegemite and all the rest. And this is what is now consumed by the proletarian masses (the ones who have not yet turned to Nutella).