British farmers fear they could go out of business following a post-Brexit trade deal with the US, the National Farmers Union has told the BBC.

If Britain wants a trade deal with the US, it must accept American food standards, including those allowing genetic modification and chicken to be washed in chlorine, the head of America’s farming lobby has said.

The UK must accept US food standards as part of any future trade deal with Washington, the head of America's farming lobby has said.