Farming bosses have demanded that Keir Starmer “stand up” for the sector in any trade deal with the US.

The National Farming Union (NFU) issued the warning amid a potential agreement to avoid reciprocal tariffs from 2 April, the day a number of US tariffs on trade come into force.

In a joint statement, the organisation’s presidents said: “It’s extremely concerning to see media reports that the UK government is trying to avoid US tariffs by seeking an urgent trade deal. While we do not want to see tariffs on UK agri-food going into the US, our second largest export market beyond the EU, it means our negotiators are on the back foot from the get-go and makes a balanced negotiation incredibly difficult.

“With the UK farming sector already under huge strain, with confidence at an all-time low and investment dropping day by day, it cannot deal with another trade deal which sells out domestic food and farming.

“In the last couple of years, we’ve seen a much stronger performance by governments in safeguarding our most vulnerable sectors and seeking mutually beneficial trade deals. This is this government’s first test to see if it will do what it promised and stand up for UK farming, or if it will roll over under pressure from an aggressive US administration.

“Absolutely no one wants to see hormone treated beef, or pork or chicken treated with anti-microbial washes – which are banned here in the UK – sold on our market. Those ways of production were banned in the 80s and 90s for a reason. They don’t reflect our values and the farm to fork approach we are proud of in the UK, something we know the British people care deeply about.

“Yes, the world is changing. But this is no time for a knee-jerk reaction. We urge the government to honour the commitments it has repeatedly made both to farmers and the public – that it will protect the safety, animal welfare and environmental standards which are at the heart of UK food, and not allow it to be undermined by shoddy trade deals.”

The NFU said food growers and producers had been “let down” by previous governments in recent trade deals.

At the NFU’s conference in February, Environment Secretary Steve Reed said: “We will never lower our food standards in trade agreements. British farming deserves a level playing field where you can compete and win and that is what you’ll get. We will use the full range of powers at our disposal to protect our most sensitive sectors.”

A lucrative trade deal with the US is all the more pertinent for Ms Reeves after she admitted during her spring statement that the Office for Budget Responsibility (OBR) had halved the UK growth forecast for 2025 from 2% to 1%.