Boris Johnson made a false claim about Labour even as he defended himself against claims of dishonesty.
Rattled by a sustained attack from Keir Starmer, the flailing Prime Minister claimed Labour had opposed his Brexit trade deal, which they did not.
A Labour spokesman called for the Prime Minister to return to the Commons to correct the record.
It’s the latest in a string of false claims Mr Johnson has made in the House of Commons, for which he has repeatedly refused to apologise or correct his claims.
And today he repeatedly refused to say who had initially paid for the refurbishment of his Downing Street flat - only saying that he had “covered the cost”.
Questions have been mounting since former aide Dominic Cummings accused Mr Johnson of wanting donors to "secretly pay" for the renovations to his No 11 residence in a "possibly illegal" move.
This morning, the Electoral Commission launched an investigation into the affair, saying there was "reasonable grounds" to suspect an offence may have occurred.

Mr Starmer repeatedly pressed him to admit who had been the original source of the funding - with the Prime Minister getting visibly furious at the line of questioning.
Finally, Mr Johnson lashed out with an extended despatch box tantrum, during which he said: "Last night, our friends in the EU voted to approve our Brexit deal, which he opposed."
This is untrue.
In fact, despite resistance from his backbenchers, Mr Starmer whipped his MPs to vote in favour of the deal, in a vote on December 30 2020.
And in a European Parliament vote last night, the deal was approved by 660 votes to five, with 32 abstentions.

Mr Johnson went on: "This not only allows us to take back control of our borders - which it does, which he fervently opposed - enabling us to deal with such threats as the European Super League."
It's unclear what he meant by this, but it also appears to be untrue. While it's possible he was referring to the UK's post-Brexit 'flexibility' with competition law - it was, in the end, public outcry forcing clubs to withdraw that scuppered the European Super League.
Following the display, the SNP ’s Westminster Leader Ian Blackford - cheekily circumventing Parliamentary rules - did not directly call the Prime Minister dishonest, but instead asked: “Are you a liar?”
Mr Johnson squirmed at the accusation, asking the Speaker to rule on whether it was ‘unparliamentary’. Speaker Lindsay Hoyle ruled that it was not, but said it was “not what we’d expect.”