Boris Johnson has missed the London Assembly deadline to hand over evidence about his relationship with Jennifer Arcuri.
The Prime Minister failed to provide written evidence to the Greater London Authority’s oversight committee before the two-week deadline expired at 6pm.
After the deadline passed, Downing Street confirmed there will be a response later today about the allegations about his relationship with the US businesswoman while he was London mayor.
However, the Mirror reported Number 10 is not expected to comply with the request.
Mr Johnson was sent a letter, dated September 23, that raised concerns he had “failed to declare a potential conflict of interest in relation to the awarding of public funds to Jennifer Arcuri”.
The Prime Minister could now face a summons to explain his relationship with Ms arcuri after the deadline passed.
Len Duvall AM, chair of the London Assembly Oversight Committee said: “It is very disappointing that we have not received a response from the Prime Minister.
“Missing the deadline of a polite request to fully cooperate is unhelpful and this already serious situation has now become grave.
“The allegations of potential misuse of taxpayers’ money are no laughing matter. We will be taking this further.
“There are now a range of options available to us. Next week, the Oversight Committee will meet to discuss those options and decide on its next course of action.
“You can be assured that the London Assembly will investigate this matter with absolute commitment.”
The letter sent to Mr Johnson requested within 14 days “details and a timeline of all contact with Jennifer Arcuri including social, personal and professional, during his period of office as Mayor of London”.
It also requested “an explanation of how that alleged personal relationship was disclosed and taken into account in any and all dealings with the GLA”.
It is one of four investigations into his links with Ms Arcuri. Both deny any wrongdoing.