Labour leader Keir Starmer delivered a devastating series of blows as he piled pressure on Prime Minister Boris Johnson and Foreign Secretary Dominic Raab.
Sir Keir was speaking during today's emergency debate on Afghanistan, which has fallen to the Taliban in recent days.
Both the Prime Minister and Mr Raab have been heavily criticised for their handling of the crisis, which came after US and UK forces left the country.
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Both men were on holiday as the Taliban seized control, with Mr Raab accused of continuing his stay at a five-star resort in Crete as the situation in Afghanistan rapidly unfolded.
And in a powerful speech during the debate today, the Labour leader embarrassed the two senior figures with a series of brutal take-downs.
He said: "The Prime Minister's response to the Taliban arriving at the gates of Kabul, was to go on holiday.
"No sense of the gravity of the situation, no leadership to drive international efforts on the evacuation."
At this point he responded to Foreign Secretary Mr Raab shaking his head and asking what he would have done differently with a cutting response, stating: "What would I have done differently? I wouldn't stay on holiday whilst Kabul was falling."
He added: "The Foreign Secretary shouts now but he stayed on holiday while our mission in Afghanistan was disintegrating.
"He didn't even speak to ambassadors in the region as Kabul fell to the Taliban, let that sink in."
And in another killer line, he added: "You cannot co-ordinate an international response from the beach."
Summing up, Starmer added: "A dereliction of duty by the Prime Minister and the Foreign Secretary, a government totally unprepared for the scenario that it had 18 months to prepare for."
The Labour leader has sometimes been criticised of not going for the jugular against the government, but this was one of his strongest performances in a while, which left the Prime Minister and his Foreign Secretary looking embarrassed.
His party will want to see many more clinical performances like this from their leader going forward.
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