Rishi Sunak's Commons microphone was briefly cut off just as he attempted to declare to Keir Starmer: "Britain isn't listening".
The unfortunate moment for the PM - prompting laughter from MPs - came as he appeared rattled during a bruising exchange with the Labour leader. Mr Starmer had ridiculed him at PMQs for having a "reverse Midas touch" after failing to deliver on pledges to cut migration, NHS waiting lists, and the tax burden.
But as he attempted to deliver his response, Mr Sunak's microphone was turned off as the Speaker Sir Lindsay Hoyle intervened to stop MPs in the chamber from jeering. Apparently unaware, the PM continued and was overheard attempting to declare: "Britain isn't listening".
Just moments earlier Mr Sunak had accused the Greek Prime Minister of "grandstanding" over the Elgin Marbles amid an escalating diplomatic row. At the fiery session of PMQs, the Labour leader taunted the PM over the fiasco surrounding the ancient sculptures removed from Greece in the early 19th Century.
Mr Sunak scrapped a meeting with Greek PM Kyriakos Mitsotakis this week after the Hellenic leader broke a pledge not to use his trip to press for the Marbles to be returned to Athens. Deeping the row with Greece, Mr Sunak claimed Mr Mitsotakis was trying to "grandstand" over the repatriation row.
He said: "Of course, we're always happy to discuss important topics of substance with our allies like tackling illegal migration or indeed strengthening our security. But when it was clear that the purpose of the meeting was not to discuss substantive issues for the future, but rather to grandstand and relitigate issues of the past, it wasn't appropriate."
"But furthermore, when specific commitments and specific assurances on that topic were made to this country, and then were broken, it may seem alien to him but my view is when people make commitments, they should keep them." The Labour boss accused the Premier of “trying to humiliate” his Greek counterpart.