DOWNING Street said Boris Johnson wants to “maximise” the benefits of trade deals as he intervened in the Cabinet row over a planned agreement with Australia.

The Prime Minister chaired a meeting of senior colleagues as negotiations with Australia about the terms of a deal continued.

International Trade Minister Liz Truss and Environment Minister George Eustice are thought to be at odds over the proposals and the impact they might have on British farmers. Truss, who has said she wants an agreement in principle by early June, is thought to favour a zero-tariff, zero-quota approach in order to boost the flow of trade.

Such a move could leave British farmers vulnerable to competition from beef and lamb producers in Australia. Eustice suggested quotas could be used to protect them.

The Prime Minister’s official spokesperson said: “There are a regular series of meetings on not just this trade deal but the deals we have been working on throughout.

“The Prime Minister met with the ministers involved, like Liz Truss obviously, as part of the regular process.”

Johnson “wants to maximise the massive opportunities presented by post-Brexit trade deals”, the spokesperson said.

Downing Street insisted farmers would be protected in any deal with Australia.

“Any agreement would include protections for our agriculture industry and won’t undercut UK farmers,” the spokesperson continued.

“We want a deal that is good for the British public and any agreement would have protection for the agriculture industry.”

But the spokesperson refused to be drawn on what the measures to protect farmers would be, insisting he would not comment on the ongoing negotiations.

The proposed deal has been criticised on environmental grounds because of the prospect of Australian beef being shipped around the world.

Patrick Holden, chief executive of the Sustainable Food Trust, said: “Our cattle come from a mainly grass-fed nation and we have one of the best carbon footprints for beef production in the world.

“In contrast, imported Australian beef will likely be produced on feedlots, fed on grain and full of antibiotics and growth-promoting hormones.”