At least 40 further food products were added yesterday to the Food Standard Agency’s list of products being withdrawn for being contaminated with the illegal Sudan 1 dye.

The new products, which include Birdseye’s Healthy Options Beef Hotpot and Hazlewood’s 1000 Island Dressing, brings the total amount of products on the list to 618.

The latest withdrawal has led to questions being asked as to why these products did not meet the FSA’s deadline last Thursday whereby all manufacturers and retailers were asked to check which of their products had been contaminated.

An agency spokesperson is reported to have said that it took this long to follow ingredients back through the supply chain.

Sudan 1, a banned dye which is a suspected to cause cancer in humans, was detected last month in chilli powder imported from India and used by Premier Foods in its Worcester sauce.