This is a major contamination incident in the food chain causing illness, hospitalisation and possible fatalities, in a moderate or large number of people over a period of days to a week.
Examples have been Salmonella contamination in chocolate in 2006 and non-UK eggs in 2009 and Botulism cases in Scotland linked to korma sauce in 2011.
Loss of working hours as a result of illness can have a significant economic impact.
There would also be pressure on local healthcare providers such as doctors and hospitals.
What can you do?
Be aware if cases are identified and follow any advice given.