SIR KEIR STARMER rejected calls today to cancel the upcoming state visit of King Charles to the US as relations between London and Washington plunged to new lows.

Liberal Democrat leader Ed Davey demanded that the Prime Minister scrap the royal trip after the latest volley of insults and threats from the US president.

Mr Trump, Mr Davey said, had said he may “rip up” the US-Britain trade deal which Sir Keir has long touted as a major achievement “as punishment for us not joining his idiotic war in Iran.”

“Surely the Prime Minister can’t send our King to meet a man who treats our country like a mafia boss running a protection racket,” the Liberal Democrat leader said in the Commons.

But Sir Keir said the visit, ostensibly to mark the 250th anniversary of US independence from Britain, would proceed as planned.

The monarchy “is an important reminder of the longstanding bonds” between the two countries, he said.

The Prime Minister is also set to ignore a call from Labour’s First Minister in Wales Eluned Morgan to end involvement in a joint US-British-Australian military radar project in Pembrokeshire.

She said: “The United States under Donald Trump is not the partner it once was.

“Talk of targeting civilians, undermining our allies, and diminishing the sacrifice of our armed forces is not the conduct of a reliable ally.

“There is a clear difference between standing with our partners and giving a free pass to a US president who has threatened war crimes and shown contempt for our country.

“I’m urging the UK government to halt our involvement in the Aukus radar project until we can be confident those partnerships reflect our values, and our security interests.”

But a Downing Street spokesman said the project would “secure long-term jobs in Pembrokeshire, Wales, and help protect essential satellite communication and navigation works.”

However, Sir Keir is also noticing the political benefits of taking his distance from Mr Trump and again told MPs that Britain was “not going to get dragged into this war with Iran.”

Responding to the latest menaces from Washington, he struck a defiant pose: “I’m not going to change my mind, I’m not going to yield,” he said.

The US president had said the relationship with Britain was in a “sad state” and added: “We gave them a good trade deal, better than I had to, which can always be changed.”

Today Sir Keir implied that Russia was benefiting from Trump’s war, while Chancellor Rachel Reeves has said that it makes her “angry.”