For 200 years we have been putting it on our roast beef and our pork pies, and to celebrate Colman's Mustard in Norwich have released a set of archive photos.
Click below to watch Kate Prout's report:
More top news
A female zookeeper at Hamerton Zoo in Cambridgeshire has died after being attacked by a tiger in an enclosure
Despite the misty end to the bank holiday thousands of tourist attractions and businesses declare the weekend a huge success
Cloudy, humid at first, with thundery showers dying out.