Horse DNA has been found in a frozen dinner withdrawn from sale last week by Tesco.

Tesco tonight announced that tests had confirmed that its frozen Everyday Value Spaghetti Bolognese had been contaminated with horse meat, with some exceeding 60%.

British Environment Secretary Owen Paterson will update MPs today on the horsemeat scandal after warning that the next set of tests could produce more bad results.

Companies in Romania, Cyprus, the Netherlands, and France have now been implicated in the horsemeat saga that has seen huge percentages of horse being sold as beef in ready-made meals.

The EU's law enforcement agency, Europol, has been asked to assist in the investigations into the Europe-wide horse meat scandal.

Frozen beef lasagne and spaghetti bolognese from discount retailer ALDI have have tested positive for between 30% and 100% horse meat, the Food Safety Authority of Ireland (FSAI) said this evening.

Testing on Findus beef lasagne has revealed that some of the ready meals may have contained up to 100% horsemeat.

Testing on Findus beef lasagne has revealed that some of the ready meals may have contained up to 100% horse meat, Britain's Food Standards Agency (FSA) said tonight.

Yet more popular food products have been withdrawn from supermarket shelves over concerns relating to their contents.

Aldi has withdrawn its frozen lasagne and frozen spaghetti Bolognese from sale.