Sir Keir Starmer was seen scrambling to pick up Donald Trump's UK-US trade deal papers last night after landmark talks between the pair.
As the two leaders announced the deal's official signing at the G7 summit in Canada, Trump opened up a folder to show a crowd of reporters its contents.
Then, several papers spilled onto the floor, prompting Starmer to quickly bend down and gather them.
"Oops, sorry about that," the President said, while Starmer added: "It's a very important document."
Sir Keir Starmer was seen scrambling to pick up Donald Trump's UK-US trade deal papers
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Standing alongside the Prime Minister, the President then said: "We signed it and it's done", before mistakenly announcing the deal was with the European Union, rather than the UK.
He added: "It's a fair deal for both. It'll produce a lot of jobs, a lot of income."
Starmer said the completed deal applies to "car tariffs and aerospace", describing the agreement as a "sign of strength" between Britain and America.
"Donald, thank you very much. This now implements on car tariffs and aerospace," the Prime Minister said.
"A really important agreement. And so this is a very good day for both of our countries, a real sign of strength."
'This is a very good day for both of our countries, a real sign of strength,' Starmer vowed
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Under the deal's terms, first announced at the White House in early May, UK carmakers will face a 10 per cent tariff when selling vehicles to the US rather than 25 per cent.
In exchange, Britain is removing tariffs on American shipments of products including beef and ethanol.
The Department for Business & Trade confirmed the US has committed to eliminating tariffs on UK aerospace goods such as engines and aircraft parts.
But uncertainty remains over steel tariffs.
'We signed it and it's done', Trump said, before mistakenly announcing the deal was with the EU
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When asked whether the levies would be reduced to zero for the UK, Trump replied: "We're gonna let you have that information in little while."
Britain has endured months of negotiations to secure reductions in the tariffs Trump imposed across the rest of the world on April 2.
And Trump praised Starmer for achieving what his Tory predecessors could not, telling reporters: "The Prime Minister's done a great job, I want to just tell that to the people of the United Kingdom.
"He's done what other people... They've been talking about this deal for six years... and he's done what they haven't been able to do."