Secretary of State at Defra, Owen Paterson, MP for North Shropshire, says sale of horse meat as beef was totally unacceptable.
He told the NFU conference in Birmingham.
"I am determined this criminal activity should be stopped."
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Police say that David Noakes' disappearance is incredibly out of character.
The victim, who lost a leg in the incident, said his injuries had been truly "life-changing" in a statement read out to court.
Kingsley Burrell died after suffering a cardiac arrest in hospital in 2011 following his detention by police under the Mental Health Act.