Neighbour Tom Penn telephoned the police after hearing the couple arguing just after midnight on Friday, as well as making a recording which they then played to the Guardian. In the mobile phone recording, a woman can heard telling someone “get off me” and ordering a man to leave her Camberwell flat. The incident prompted enormous publicity, and Mr Johnson subsequently ducked a series of questions on the subject posed by Iain Dale at a hustings event in Birmingham yesterday.
Mr Dale asked him: “Why was the police called to your house last night?”
In response, Mr Johnson said: “I don’t think they want to hear about that kind of thing.”
Mr Dale tried several times without success to get him to answer the question before eventually moving on.
Several Tory colleagues, including International Trade secretary Liam Fox, and Jeremy Hunt, the Foreign Secretary as well as being Mr Johnson’s opponent in the Conservative Party leadership election, have urged him to explain what happened.
However, Daniel Kawczynski, Tory MP for Shrewsbury and Atcham and a prominent supporter of Mr Johnson’s campaign, disagreed about what he described as “neighbour-gate”.
He told Express.co.uk: “I’m appalled that neighbours would do something like this.
“They clearly have some sort of agenda there.
“I’m told the neighbour’s wife talked of having given Boris Johnson ‘the finger’ days earlier.
“The fact is we have all had arguments with our partners – in fact I think it would be pretty strange for any couple if they never argued.
“If Ms Symonds had said something to the media about how she had felt threatened in some way that would be a different thing.
“But as I understand it she is horrified by what the neighbours have done here.
“I think this is a storm in a teacup, frankly.”
Mr Johnson moved in with Ms Symonds, a former Conservative Party communications director, after the collapse of his 25-year marriage to Marina Wheeler, with whom he has four children.
At 26, the eldest, Lara Lettice, is just five years younger than her father’s lover.
Mr Johnson’s private life has come under scrutiny in recent months, particularly since he confirmed his leadership bid.
In 2013, it was confirmed Mr Johnson had fathered a fifth child with art consultant Helen MacIntyre after the Court of Appeal quashed an injunction seeking to ban reporting of her existence.