We're used to it by now - but it doesn't mean we should stop holding him to account.
Boris Johnson submitted to questioning from LBC radio this morning for an hour, and he told a few porkies.
From police spending to NHS spending to spending on the garden bridge, there were a few familiar dodgy claims he made which just didn't stack up.
Deputy Lib Dem leader Ed Davey said: "This interview has exposed yet again how Boris Johnson can’t be trusted and is simply not fit for the office of Prime Minister.
"Whether it was on nurses, hospitals or Brexit , Johnson spent an hour lying through his teeth."
Shadow Education Secretary Angela Rayner added: “Boris Johnson’s refusal to apologise for his hateful comments about single mothers, their children and working class men is an absolute disgrace."
Even host Nick Ferrari hauled him up, saying: "You misrepresent the figures. Why do you continually do this Mr Johnson?"
On more police on the streets
WHAT HE SAID: "I'm also proud that we're putting 20,000 more police out on the streets."
THE FACTS: The number of police officers has fallen by around 21,000 since the Tories took power in 2010, so the new officers will only roughly make up for cuts.
On other people's children
WHAT HE SAID: "I don’t comment on other people’s children."
THE FACTS: In a 1995 Spectator column, he branded the children of single mothers "ill-raised, ignorant, aggressive and illegitimate".
On more money for the NHS
WHAT HE SAID: "The NHS, as you know, it's the biggest increase in living memory, a £34bn increase."
THE FACTS: The Tories are indeed pledging £34bn in cash terms by 2023/24 - a 3.2% real terms rise. But the IFS think tank makes clear this is still less than it used to rise under Labour - and comes after years of Tory cuts. The IFS said: "UK health spending has historically grown at an average real rate of 3.6% per year, but grew by just 1.3% per year between 2009−10 and 2018−19." Labour's plans promise real growth of 3.8% per year.
On 40 'new' hospitals
WHAT HE SAID: "40 new hospitals will be built as a result of decisions we're taking".
THE FACTS: Boris Johnson ’s promise of 40 ‘new hospitals’ includes renovations of existing hospitals. He later conceded "they will be new buildings".
On the Garden Bridge
WHAT HE SAID: He repeated his claim that Sadiq Khan, his successor as London mayor, plunged £17million into the Garden Bridge after he took office.
THE FACTS: This is deeply misleading. It was Boris Johnson who trumpeted a failed plan for a “floating paradise” across the River Thames that blew £43million of public money. He was a doughty defender of the “vanity project” - even making a secretive trip to San Francisco in 2013 in a bid to get Apple to sponsor it. Meanwhile Sadiq Khan announced a review of the project in September 2016 and it revoked approvals for it in May 2017. Yes, money was spent after Sadiq Khan became London mayor in May 2016 - but thrown into the mix were prior commitments and a 'ministerial direction' from the Tory-run Department for Transport.
