BORIS Johnson on Wednesday dodged questions on who initially paid for his £58k No11 flat refurb after the elections watchdog opened a major probe into whether he broke the law.
In a bombshell announcement just an hour before PMQs, the Electoral Commission watchdog announced a formal investigation into the doing up of his private residence.
If found guilty, the PM could face huge fines, or the police could even be involved if there's a serious breach of the law.
The move is a hammer blow to BoJo just days before crunch local elections, and will heap fresh pressure on him to finally come clean on the details of the murky funding arrangements behind the plush makeover.
The PM has been battered by a massive political storm over claims he went cap in hand to Tory donors to stump up megabucks so he could plaster No11 in £800-a-roll wallpaper and trendy pink sofas.
And today Sir Keir pressed him repeatedly on whether the Tory party leant him the money to pay the bills - to which he refused to answer.
He said: "Who initially, and Prime Minister, initially is the key word here, who initially paid for the redecoration of his Downing Street flat?"
"Either the taxpayer paid the initial invoice, or it was the Conservative Party, or it was a private donor, or it was the Prime Minister."
Boris would only blast the Labour boss for his "bizarre" probing and say the row was "irrelevant" to people's concerns.
Slapping back attacks on him, he added: "I would much rather help people get on the property ladder and it's this Conservative government that has built 244,000 homes in the last year, which is a record over 30 years."
He told the Commons in a fiery exchange: "I have given him the answer, I have covered the costs.
Boris Johnson dodges questions on who initially paid for his £58k No11 flat refurb after watchdog opens major probe
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