that Paola Cuneo, the then director of the Sirius programme, had previously spent two-and-a-half years working at London & Partners, the official mayoral promotional agency which Mr Johnson had responsibility for while he was Mayor.
The revelations will raise further questions over a possible conflict of interest and whether Mr Johnson played an improper role in obtaining government support for the American model.
THIGH SQUEEZE The storm comes as Mr Johnson was separately forced to deny groping a female journalist Charlotte Edwardes - even though he could not remember the lunch where where she claims it happened.
The Prime Minister said claims he squeezed Ms Edwardes' thigh at a Spectator lunch 20 years ago were not true, but he had "no memory whatsoever" of the meal.
Reflecting on the pressure he was under, the Prime Minister accepted it was "inevitable" he would come under "shot and shell", but said he thought it was "raining down" on the Government because of his vow to take the UK out of the EU on October 31.
In response to Ms Edwardes' claims about an incident at the Spectator's HQ shortly after Mr Johnson became the magazine's editor, Mr Johnson told ITV the allegation was "absolutely not true" even though he could not remember the lunch.
Asked if women could trust him, he said "absolutely" and claimed his administration as mayor of London was "more or less a total feminocracy".
In a further blow to the Tories, on a day when they tried to burnish their credentials as the party of law and order, senior MP Sir Geoffrey Clifton-Brown was ordered home in disgrace after clashing with conference security staff.
The party said his conduct was "totally unacceptable" after an altercation as he tried to get his fiancee into a restricted area of the venue.
Tech entrepreneur Jennifer Arcuri received taxpayer cash at the same time as she was allegedly having an affair with Boris Johnson Credit: Refer to Caption Johnson has vehemently denied wrongdoing in regards to his public relationship with Jennifer Arcuri Credit: Rex Features We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368. You can WhatsApp us on 07810 791 502. We pay for videos too. Click here to upload yours.