Marmite is a by-product of the brewing industry. It's made from yeast extract. As the largest area for brewing was Burton-on-Trent that is where the Marmite factory is based. Marmite is better than Vegemite because the Australians could never brew a decent beer so they had to use something different. Bovril is the one that's a by-product of the Beef industry. I only know this because Staffordshire has bugger all industry so it's always good to know what your options are.