The 'chaos' around Brexit has been blamed for Colman's Mustard not being available to buy at Tesco. And in this difficult time for mustard fans, here are 10 things you need to know about the Norfolk mustard.

1. Mustard seed used in the manufacturing process at Stoke Holy Cross was brought in by wagon from Cambridgeshire and Yorkshire or shipped in from Holland.

2. Originally, the mill was powered by water alone, but as the business grew a windmill was built and, in the 1840s, steam-power was introduced with the installation of two engines that were subsequently transferred to the Carrow Works.

3. Both Jeremiah Colman, the founder of the family business, and his nephew and partner, James, were actively involved in the manufacture of mustard at Stoke; Jeremiah served out the various grades of milled mustard for mixing by James into four table mustards known as Double Superfine, Superfine, Fine and Seconds.

4. Following the move to Carrow in the 1850s, Colman's, under the direction of James' son Jeremiah James Colman, developed a range of distinctive yellow packaging for its mustards making them instantly recognisable.

5. The famous Bull's Head trademark was first used in 1855 and was said to have been adopted to reinforce the idea of mustard being the perfect condiment with beef.

6. The handwritten 'J & J Colman' on the company's labelling was taken from a lithograph of the signature by Edward Colman, one of two brothers who acted as agents for the business in London.

7. Mustard has been grown in England since Roman times, with harvesting taking place in September, but it was Colman's that introduced the concept of contract farming in 1878.

8. Before the advent of roller milling in the 1880s, stampers powered by steam were used to crumble the hard mustard seeds to release and powder the kernel. It was then sieved to remove unwanted husks which were utilised to make medicinal products or animal feed.

9. Colman's were among the first to recognise the power of advertising. Alfred Munnings was one of a number of artists who supplied poster designs and commemorative mirrors celebrating special occasions were a notably successful means of spreading brand awareness.

10. By the end of the 19th century, Colman's had become a world leader in mustard manufacturing with six different grades of mustard. At the same time, the Carrow Works had diversified to produce flour, starch and laundry blue.