Farmbox Meats: 'No cross contamination here'
The inquiry into claims of horsemeat mislabelling will be "relentless", the Food Standards Agency (FSA) says.
It comes after a slaughterhouse in Todmorden, West Yorkshire and a meat firm near Aberystwyth were raided by FSA officials supported by police.
The FSA says it suspended operations at both raided premises and seized paperwork.
But speaking to the BBC's Sian Lloyd, Dafydd Raw-Rees, the director of one of the firms raided by the FSA - Farmbox Meats - said it was business as usual at his company.