A statement from the House of Commons Environment, Food and Rural Affairs Committee said:
The evidence we received from retailers and food processors in the UK and Ireland suggests a complex, highly organised network of companies trading in and mislabelling frozen and processed meat or meat products in a way that fails to meet specifications and that is fraudulent and illegal.
We are concerned at the failure of authorities in both the UK and Ireland to acknowledge the extent of this and to bring prosecutions.
We are dismayed at the slow pace of investigations and would like assurance that prosecutions will be mounted where there is evidence of fraud or other illegal activity.
More top news
Robert Moore believes Donald Trump lost his way during the first head-to-head presidential debate with Hillary Clinton.
Police excavating a site on the Greek island of Kos say they have found pieces of fabric in their search for Ben Needham.
Donald Trump and Hillary Clinton have clashed in a fiery first presidential debate in the race for the White House.