“If we can get a working majority then we will come on January 31 at the absolute latest,” Johnson said.
He also repeated his message that he saw no reason why Britain would need to extend the transition period after Brexit beyond the end of 2020.
Asked if he would rather be prime minister or have Britain leave the EU, he replied: “I would rather get us out of the EU. I can tell you that.”
“I love my children very much, but they are not standing at this election, and I am not, therefore, going to comment,” said Johnson, whose colourful love life has attracted tabloid attention in the past.
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When asked if he was going to have more children, Johnson, 55, who is living at Downing Street with his partner Carrie Symonds after separating from his wife last year, said: “I’m not going to get into discussions (on this).”