There is growing pressure on supermarkets and restaurants to inform consumers how animals in their meat products are killed after it emerged some were selling halal meat without clear labelling.

Religious leaders have written to the Telegraph suggesting all menus and packets should specify how animals have been slaughtered, including for products that are not kosher or halal.

It has emerged a majority of New Zealand lamb sold in UK supermarkets comes from halal abattoirs in order to ensure it can be sold to both Muslim and non-Muslim nations.

Read the complete original version of this item...