A Nobel Prize-winning economist has told Sky News the recently announced UK-US trade deal “isn’t worth the paper it’s written on”.

Sir Keir Starmer and Donald Trump announced the “first-of-a-kind” agreement with a live, televised phone call earlier this week – and the British prime minister hailed the deal as one that will save thousands of jobs in the UK.

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But leading economist Joseph Stiglitz has told Sunday Morning with Trevor Phillips he “wouldn’t view [the deal] as a great achievement”.

“Any agreement with Trump isn’t worth the paper it’s written on,” he said, pointing out the president signed deals with Canada and Mexico during his first term – only to slap them with hiked tariffs within days of returning to the White House this year.

“I would view it as playing into Trump’s strategy,” he said.

“His strategy is divide and conquer, go after the weakest countries, and sort of put the stronger countries in the back.”

The scramble to secure a UK-US trade deal was sparked by Mr Trump’s ‘Liberation Day’ announcement last month, which saw the president hike import tariffs for multiple countries and subsequently send global markets crashing.

China initially faced tariffs of 34% and when Beijing hit the US with retaliatory rates, a trade war quickly ensued.

The US and China now impose tariffs of above 100% on each other, but representatives from the two countries have this weekend met for high-stakes negotiations.

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With its response to Mr Trump, Beijing “made it very clear that the US is very dependent on China in so many ways,” Mr Stiglitz said.

“So they’re beginning now to negotiate, but from a position of strength.”

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Asked if he thinks the UK should have focused on its relationship with the EU instead of the US, Mr Stiglitz said: “Very much so.

“My view is that if you had worked with the EU to get a good deal, you could have done better than what you’ve done.

“If it turns out, in the end, when you work it all out, Trump is unhappy, he’ll run. If he’s unhappy, I pray for you.”

Among the terms in the UK-US trade deal are reduced tariffs on British car and steel exports to the US, while the UK has agreed to remove a tariff on ethanol, used to produce beer.

The agreement also opens a new agricultural exchange, with US farmers being given access to the UK for the first time – though UK food standards on imports have not been weakened.