Findus Beef Lasagne found to contain 60 percent horse meat.

Discoveries so far of horsemeat in products sold as beef are likely to be the "tip of the iceberg", a British parliamentary report into the scandal said on Thursday.

"The scale of contamination emerging in the meat supply chain is breathtaking," said Anne McIntosh, a legislator who chairs the cross-party Food and Rural Affairs Committee, which published the report. "More revelations will doubtless come to light in the UK and across the European Union."