As talk of a trade deal between America and the UK hots up, farmers on this side of the Atlantic have warned ministers not to dilute British food standards, saying the use of hormones in particular cannot be accepted.
US Vice President JD Vance has said there is a "good chance" of reaching a trade deal with Britain.
But the man who speaks for Britain's livestock farmers insisted any imported US beef must pass the same tests as UK meat.
David Barton, Livestock Chair of the National Farmers' Union (NFU), said: "There is no way we would accept anything that is not produced to our standards".
The last time the two countries tried to agree a deal, negotiations faltered on arguments over food standards.
So why is something as simple as beef so difficult?
