Parliament is preparing for a showdown in the House of Commons on Monday as MPs vote on crucial amendments to the post-Brexit Agriculture Bill.
Activists say the amendments will secure British food and animal welfare standards after the UK leaves the European Union at the end of this year.
The i politics newsletter cut through the noise
Here’s what MPs will be voting on and why it all matters.
What’s it all about?
The Agriculture Bill sets out the UK’s plan for farming after Brexit, including what subsidies farmers will receive after the UK has left the Common Agricultural Policy.
Broadly, the Government’s plan to reward farmers for doing “public good” such as planting trees or improving water quality has been welcomed.
But the issue of animal welfare and food standards has emerged as a serious political flashpoint that cuts to the heart of Britain’s post-Brexit policy.
The Government has repeatedly promised to uphold food and animal welfare standards after Brexit, when the UK will be free from EU-wide regulations governing imports.
But campaigners fear the pressure to sign off post-Brexit trade deals will lead to politicians agreeing to the import of foods such as chlorinated chicken and hormone-injected beef into the UK.
They want a Government promise written into the Bill that food and agricultural imports to Britain must meet UK standards.
Why is Jamie Oliver so angry?
A petition set up by the National Farmers Union has gathered more than one million signatures from the public.
Celebrity chef Jamie Oliver is an outspoken supporter, backed by fellow chefs Hugh Fearnley-Whittingstall, Delia Smith and Anna Jones.
Mr Oliver argues the legislation, if passed unamended, will spark a “race to the bottom” that will flood the UK market with low quality food and threaten the livelihoods of farmers and food producers across the country.
Environmentalists say the amendments would help curb British support for dubious farming practices around the world, which are fuelling deforestation, climate change and biodiversity loss.
Last month the House of Lords approved two key amendments to the legislation that would satisfy the NFU and its supporters.
The first would require all agriculture and food imports to meet domestic production standards. The second would give the new Trade and Agriculture Commission the power to scrutinise all future trade deals.
The House of Commons will vote on these amendments on Monday.
Will the amendments pass?
Labour leader Keir Starmer has already said his party will support the amendments, and around two dozen Conservative MPs also plan to back the amendments.
But despite fierce lobbying, the Government has signalled it will instruct its MPs to vote against it. Ministers are thought to be eager not to tie the hands of negotiators battling to secure free trade agreements.