Findus's beef lasagne may have been contaminated with horsemeat since last summer, it has been claimed. Labour MP Tom Watson said he had obtained a letter from the company to retailers warning that a French-based supplier told it on February 2 that raw materials delivered to it since August 1 last year were "likely to be non-conform and consequently the labelling on finished products is incorrect". The letter, which Mr Watson said was sent to retailers on Monday, added: "The supplier has asked us to withdraw the raw material batches." Tesco confirmed that it was informed of a product withdrawal by Findus on Monday but did not give any more details. Findus was not immediately available for comment. | 
