Mr Biden flew into Britain on Wednesday to attend the G7 meeting in Carbis Bay, Cornwall which starts on Friday. He is scheduled to meet Boris Johnson on Thursday ahead of the summit and will also have an audience with the Queen. Thereafter, he will fly to Brussels to attend both a NATO and EU summit.

On arrival at RAF Mildenhall, the President delivered a speech to cheering US military personnel and their families.

Embarrassingly, Mr Biden managed to turn the RAF into the RFA, when referencing the UK’s military air force.

The 78-year-old said: “These partnerships have been hardened in the fire of war.

However, Mr Biden is known to have considerable concerns about Brexit and the current dispute over the Northern Ireland protocol.

Jack Sullivan, the President’s national security adviser, said Mr Biden viewed the protocol as “critical” to protecting the Good Friday Agreement.

He told the BBC: “Whatever way they find to proceed must, at its core, fundamentally protect the gains of the Good Friday Agreement and not imperil that.”