Britain says it will not sign trade deals with potential suppliers such as the U.S. that open the way for food imports that are produced in a way that would be illegal for the country's farmers.

The talks are among negotiations launched after Britain left the European Union
Input costs seen down so far this year
Dairy sector calls for 'vigilant' enforcement on British imports
CO2 shortage is caused by closure of fertilizer plants
Doubts remain on potential benefits for Canadian farmers