In the United Kingdom, Farley’s Rusks are a dry biscuit dating from the 1880s but manufactured by Heinz since 1994. They are usually given to infants, soaked in milk and mashed up. They have a cult following among university students.
In 2006 there was a short lived scare when it was found that some Farley’s Rusks contained traces of the weedkiller chlorpropham. The affected products were recalled and the contamination was traced to a batch of flour used during the manufacturing process. The level of contamination was not high enough to be considered a health risk
Info gleaned from Wikipedia