DNA tests have been ordered on school meals prepared in Lincolnshire amid growing concerns over the horse meat scandal.
It comes after horse meat was discovered in cottage pies delivered to 47 schools in Lancashire.
All schools and academies in the county have their own contracts with local providers, using food sourced in the area.
Investigations have now been launched to ensure that none of the meat is contaminated.
Keith Batty, assistant director of CfBT Education Trust, said: "At present, investigations have revealed no provider to have contaminated meat."