Horsemeat found in school pies in Lancashire Lancashire county council said it has withdrawn the pre-prepared beef product from 47 school kitchens, but stressed the discovery "does not appear to be a food safety issue." The news comes amid reports that three more British meat producers have been raided on suspicion of selling horsemeat as beef, and as the Food Standards Agency (FSA) warned of further arrests to come. One of the premises raided was in Hull, while the other two were in Tottenham in north east London. According to the FSA: "Computers and documentary evidence have been removed from these premises, as well as meat samples that have been taken for testing." The news also came as the FSA published the results of widespread testing into meat products. The FSA said 2,501 tests have been carried out on beef products, with 29 results positive for undeclared horse meat at or above 1%. These 29 results related to seven different products, which have already been reported and withdrawn from sale. The products linked to the positive results were confirmed to be Aldi's special frozen beef lasagne and special frozen spaghetti bolognese, the Co-op's frozen quarter pounder burgers, Findus beef lasagne, Rangeland's catering burger products, and Tesco value frozen burgers and value spaghetti bolognese. As the results were confirmed, pub and hotel group Whitbread became the latest company to admit horse DNA had been found in its food, saying their meat lasagnes and beefburgers had been affected. The firm, which owns Premier Inn, Beefeater Grill and Brewers Fayre, said the products had been removed from their menus and will not be replaced until further testing has been carried out. In another development as the scandal deepened, it was revealed that burgers containing horse meat have been supplied to hospitals in Northern Ireland. David Bingham from the health service's Business Services Organisation, which provides meat for the health trusts, said a range from a company in the Republic of Ireland had been withdrawn. "We have acted immediately; as soon as we got information there may be a confidence issue we withdrew the product," he said. Earlier today, Lancashire County Council said that it has withdrawn pre-prepared cottage pies from 47 school kitchens. Lancashire County Councillor Susie Charles, cabinet member for children and schools, said they had sought extras assurance that its external suppliers were not providing any products containing horse DNA. Testing had returned one positive result, she said. Relatively few schools in Lancashire use this particular product but our priority is to provide absolute assurance that meals contain what the label says - having discovered this one doesn't, we have no hesitation in removing it from menus. This does not appear to be a food safety issue but I've no doubt parents will agree we need to take a very firm line with suppliers and it is a credit to our officers that we have been able to quickly identify the problem and take the product off the menus. The Local Authority Caterers Association (LACA), which works with school caterers, said it was currently attempting to assess the situation, adding that the school meals case in Lancashire is the only one it had heard about. "It appears to be a very small, isolated situation," a spokeswoman said. We are trying to assess that. There's a lot of testing been going on in the last week. A spokesman for Worcestershire County Council said they were proactively testing samples of school meals through their own scientific services. FSA director of communications Stephen Humphreys said he could "assure" the public that all seven products which had tested positive had now been taken off the shelves. But it would likely be "impossible" to ever know the full extent of horse meat mis-labelling, FSA director in Wales, Steve Wearne, said. He said: "What we have in these set of results is a snapshot of what has been on the market and provided by wholesalers, by caterers, by retailers in the period between January, when this story broke, and now. We don't have any reliable information on what might have gone on before January 15. FSA chief executive Catherine Brown added that the agency had only just been made aware of Whitbread's announcement that some of their products had tested positive and this had not been included in their latest test figures. A Whitbread spokesman apologised to customers for any "concerns or inconvenience" and said the company was "shocked and disappointed at this failure of the processed meat supply chain." The firm said they had sent 30 products to be tested, receiving the results yesterday afternoon. The British Retail Consortium today defended the actions of supermarkets, saying that its members took their responsibilities to customers "very seriously." They said more than 1,000 tests have been conducted by their members, and supplied to the FSA, with just five own brand products confirmed as being affected.