Many people aren't aware that they are splashing fish sauce over their cheese toastie when they use Lea & Perrins.

Made with anchovies, the firm won't be changing the recipe any time soon as it dates back 170 years to 1837. Bovril went veggie for about a year a while back, but then reintroduced the beef extract. Veggies can eat Marmite, which is made from yeast extract.