Beef supplier Comigel has headquarters in France

An exterior view of the Comigel factory in Luxemboug. Credit: ITN

Food supplier Comigel has its headquarters in Metz, France and a processing plant just over the border in Luxembourg.

Tesco and Aldi have withdrawn a range of ready meals produced at the factory.

Comigel alerted Findus and Aldi that their products "do not conform to specification" on Monday.

Boss Erick Leharge, 53, has so far refused to comment.