A LIPREADER has revealed the moment Sir Keir Starmer admitted to a mystery "genuine mistake" as he greeted Donald Trump.

The PM and President sat side by side at a business leaders reception at Chequers today for what could be the biggest deal in UK history when the awkward exchange occurred.

Click here for The Sun's live blog on the state visit

The Sun can reveal their small talk began with the PM asking his American counterpart if he'd ever been to the 16th century manor house before to which he said he had.

Starmer then said: "This is the first time… it’s been passed, it happened seven days ago. It’s very rare, I tell anyone that sort of thing."

The President then said something which was inaudible before the PM responded: "Nonsense. It’s my mistake.”

A busy day with the Royals.

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