Royaume-Uni

For United Kingdom, taking into account of the prison topic in the public debate (extract of the Current Debates section) :

3 february 2013 : Pork DNA found in halal pies

Amidst the unrolling scandal of horse-meat traces in food labelled as beef products, pork DNA was also discovered in “halal-certified beef” pastry products delivered to UK prisons. McColgan’s Quality Foods Limited, based in Northern Ireland was the source of "the very small number of halal savoury beef pastry products," according to food distributor 3663, who conducted the tests suspecting the products might contain horsemeat. Eating pork is forbidded in Islamic law, and a halal certification is an official guarantee that the food product is prepared according to Islamic dietary laws. The products have now been withdrawn from circulation.

Read more at the BBC