05 Jan 2018 --- Unilever is to close the Norwich factory where Colman's Mustard has been made since 1858 in the UK. The closure will affect 113 jobs at the Carrow Works site, 40 of which will transfer to a separate Unilever site in Burton. While part of the production will move out of the county, the packing of mustard powder and the milling of the seed will remain in the Norwich area.