The US president has threatened to stop tankers from entering or leaving the channel.
The UK will not be involved in Donald Trump’s blockade of the Strait of Hormuz, it is understood.
The US president threatened to stop tankers from entering or leaving the key oil and gas shipping lane – which has been throttled by Iran in retaliation for the US-Israel war against it, sending energy prices soaring.
After US-Iranian peace talks in Pakistan ended without a deal, Mr Trump lambasted Iran for failing to release its grip on the strait and commit to giving up its nuclear ambitions.
He wrote on his Truth Social platform that the US Navy would start “blockading any and all ships trying to enter, or leave, the Strait of Hormuz”.
Mr Trump added, without elaborating: “Other Countries will be involved with this Blockade.”
But Britain will not play a part in the move, the Press Association understands.
A Government spokesperson said: “We continue to support freedom of navigation and the opening of the Strait of Hormuz, which is urgently needed to support the global economy and the cost of living back home.
“The Strait of Hormuz must not be subject to tolling.
“We are urgently working with France and other partners to put together a wide coalition to protect freedom of navigation.”
Sir Keir Starmer has previously said “as many partners as possible” must be involved in coming up with a “viable plan” to reopen the maritime pinch point, pointing to the UK’s role in hosting talks on the issue with a coalition of countries.
The Prime Minister said UK mine hunting systems were already in the region.
