For the most up to date information on which products are being withdrawn from the food chain see the Food Standards Agency website:
Consumers are able to check for themselves what products, and the outlets selling them have been withdrawn there is a full list from the FSA website, but it now involves more than 400 individual items in all the major supermarket chains.
This list was updated as recently as Wednesday, but the FSA is keen to stress there is no risk of immediate illness and the health risk generally is likely to be very small from ingredients tainted with Sudan 1.
Sauce
The problem has been further complicated because the Sudan 1 contaminated chilli was used to make Crosse and Blackwell Worcester Sauce, itself then added to several other products.
The makers of Lea and Perrins Worcestershire Sauce, who say they hold 90% of the market says its products have not been contaminated.
The company says it uses chilli essence and its sauces are perfectly safe.
Risk
The FSA's website says: "Sudan I can contribute to an increased risk of cancer but at the levels present the risk is likely to be very small.