You really need to have a Trade Desc<x>riptions Act. Then, if the product is not as described, the company or retailer is in breach. New Zealand has such an act -part of the Nanny State Legislation a previous government put through. We groaned at the time, but it is very useful and businesses really watch out. We also have the Fair Trading Act -one of the advantages is that a product you buy must be fit for the purpose. If not, you have the right to return it. Consumer protection rules!
This is the tip of the Iceberg on what you think you may be eating in the UK, the UK Government's Food Standards Agency is not up to the job and they are well funded and have a good staff cover.<br />
Local authorities are more vigilant with cafes, hotels, take away's etc on a far smaller budget, they do a good enforcement job for our safety.<br />
The Food Safety Agency is the same as the Financial Services Authority, both hopeless look what happened to the UK banks in 2008 onward's, failure like your food.