Boris Johnson has denied talking about Turkey during the Brexit referendum campaign, despite having warned on several occasions in the run-up to the vote that Turkish immigration posed a threat to the UK.

Answering questions during a speech in Staffordshire, the former foreign secretary claimed he “didn’t say anything about Turkey in the referendum ... I didn’t say a thing about Turkey”.

But during the referendum campaign, Mr Johnson discussed the issue of immigration from Turkey numerous times, including writing to then prime minister David Cameron to warn him about the issue.

The Vote Leave campaign, of which Mr Johnson was a prominent member, also repeatedly warned voters that the UK faced the prospect of up to 77 million Turks – the entire population of Turkey – coming to the UK if the country was allowed to join the EU.

Speaking after delivering a wide-ranging speech that is likely be seen as a relaunch of his Conservative leadership ambitions, Mr Johnson denied having mentioned Turkey at all during the Brexit campaign.

Asked whether his claims that up to 80 million Turks could enter the UK was evidence that he would “say anything just to win an election – in this case, the Conservative leadership election”, he replied: “Actually, I didn’t say anything about Turkey in the referendum. I didn’t say a thing about Turkey.

“I think anybody who has followed my utterances over the last 20 years would know that I’ve always been in the camp of those who defend and support [immigration].”

Pushed on whether he was “disowning” the comments he made in 2016, he said: ”Since I made no remarks I can’t disown them. I didn’t make any remarks about Turkey.”

Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Show all 14 1 /14 Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Internal divisions in the Conservative Party have exploded into a bitter public row over Boris Johnson‘s “disgusting” criticism of Theresa May. Some senior Tories furiously denounced the former foreign secretary after he accused the prime minister of having ”wrapped a suicide vest” around Britain Reuters Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Sajid Javid, Home secretary Sajid Javid, the home secretary, rebuked his former cabinet colleague and said: “I think there are much better ways to articulate your differences.” He told the BBC’s Andrew Marr Show that the public wanted politicians to use “measured language” BBC/PA Boris Johnson 'suicide vest' Brexit jibe causes Tory divide But other MPs leapt to Mr Johnson’s defence, as dividing lines ahead of a possible leadership contest begin to take shape. The Uxbridge MP has repeatedly criticised Ms May’s Chequers plan and used a newspaper article on Sunday to suggest it amounted to “wrapping a suicide vest around the British constitution”. His latest salvo at the prime minister prompted immediate condemnation, with one minister publicly vowing to end Mr Johnson’s career over the matter PA Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Alan Duncan, Foreign minister Alan Duncan, a foreign minister who worked in Mr Johnson’s team for two years, wrote on Twitter: “For Boris to say the PM’s view is like that of a suicide bomber is too much. This marks one of the most disgusting moments in modern British politics. “I’m sorry, but this is the political end of Boris Johnson. If it isn’t now, I will make sure it is later.” Getty Boris Johnson 'suicide vest' Brexit jibe causes Tory divide James Brokenshire, Housing secretary Housing secretary James Brokenshire added his voice to the criticism, calling Mr Johnson’s comments ”wrong” He said: “I think he is wrong on this...I think the tone that he has used isn’t right and I think that we just need to be very focused on actually moving forward with the Chequers plan.” AFP/Getty Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Zac Goldsmith But as Tory hostilities spilled over into open public warfare, Richmond Park MP Zac Goldsmith, an ally of Mr Johnson, hit back at Mr Duncan. He wrote: “There are a number of possible motives behind this tweet, but given its author, we can be certain ‘principles’ aren’t one of them.” Getty Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Jacob Rees-Mogg Senior Tory Brexiteer Jacob Rees-Mogg told The Independent he thought Mr Johnson’s “suicide belt” accusation was little more than “a characteristically colourful catchphrase”. He added: “I agree with the sentiment. The criticism of Boris’s wording merely serves to highlight his point. It means more people hear of Boris’s criticism of Chequers and many will agree with him.” Reuters Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Nadine Dorries Nadine Dorries, another Brexit supporter, said Mr Johnson’s opponents were “terrified of his popular appeal”, adding: “Don’t underestimate the vitriol that’ll be directed towards Boris today. He delivered the Leave vote, Remainers and wannabe future PMs hate him.” If Mr Johnson became leader and prime minister he would deliver a “clean and prosperous” Brexit, she said Rex Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Andrew Bridgen Andrew Bridgen said Ms May was to blame for her leadership problems. Asked if Mr Johnson had put a bomb under her leadership, Mr Bridgen said: “I think that Theresa May did that herself when she put forward the Chequers proposals without consulting widely prior to that.” Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Steve Baker, former Brexit minister Steve Baker, the former Brexit minister, warned Ms May the Conservatives faced a "catastrophic split" if she did not jettison her Chequers plan. Mr Baker, who quit the government in July over the scheme, said: “When negotiating, the prime minister needs to demonstrate her intent and also her power to deliver. "If we come out of conference with her hoping to get Chequers through on the back of Labour votes, I think the EU negotiators would probably understand that if that were done, the Tory party would suffer the catastrophic split which thus far we have managed to avoid.” But he insisted he did not want a change in the Conservative leadership, saying Brexiteers did “not want to be in a position of conflict with our own prime minister” Reuters Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Tom Tugendhat The deep divisions on the Tory benches were laid bare as Tom Tugendhat, who chairs the Commons foreign affairs committee and is a possible leadership rival to Mr Johnson, also hit out at the former foreign secretary. Recalling how he encountered a suicide bomber in Afghanistan during his time in the army, Mr Tugendhat told Mr Johnson to “grow up”. He said: “A suicide bomber murdered many in the courtyard of my office in Helmand. 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Downing Street and Conservative Campaign Headquaters (CCHQ) both denied having leaked the 4,000 word memo after it was circulated around Westminster AFP/Getty Boris Johnson 'suicide vest' Brexit jibe causes Tory divide Mr Johnson confirmed that his 25-year marriage to wife Marina had ended AP

In April 2016, Mr Johnson warned: “I am very pro-Turkish but what I certainly can’t imagine is a situation in which 77 million of my fellow Turks and those of Turkish origin can come here without any checks at all. That is mad – that won’t work.”

And in a joint letter with fellow Brexiteer Michael Gove in June 2016, just a week before the referendum, he wrote to Mr Cameron to insist that the only way to protect the UK from mass immigration from Turkey was to leave the EU.

The letter said: “Despite the rapidly accelerating pace of accession negotiations, ‘In’ campaigners maintain that Turkey ‘is not an issue in this referendum and it shouldn’t be’.

“Others assert that the UK has ‘a veto’ on Turkish accession. This claim is obviously artificial given the government’s commitment to Turkish accession at the earliest possible opportunity.

“If the government cannot give this guarantee, the public will draw the reasonable conclusion that the only way to avoid having common borders with Turkey is to vote Leave and take back control on 23 June.”

The Vote Leave campaign also included prominent references to Turkey on many of its campaign materials.

Brexit deal vote: Opposing groups of protesters gather by parliament Show all 20 1 /20 Brexit deal vote: Opposing groups of protesters gather by parliament Brexit deal vote: Opposing groups of protesters gather by parliament Brexit supporters outside parliament PA Brexit deal vote: Opposing groups of protesters gather by parliament An anti-Brexit protester adjusts her pro-EU wig AFP/Getty Brexit deal vote: Opposing groups of protesters gather by parliament A message to Jeremy Corbyn in support of a people’s vote Getty Brexit deal vote: Opposing groups of protesters gather by parliament A mock Titanic captained by Theresa May heads towards an iceberg in a stunt by campaigning group Avaaz AP Brexit deal vote: Opposing groups of protesters gather by parliament Anti-Brexit protesters outside parliament PA Brexit deal vote: Opposing groups of protesters gather by parliament Protesters of opposing sides are in close contact outside of parliament PA Brexit deal vote: Opposing groups of protesters gather by parliament Paintings of Theresa May and Jeremy Corbyn Getty Brexit deal vote: Opposing groups of protesters gather by parliament Former Ukip leader Nigel Farage speaks to the media at the protests outside parliament Reuters Brexit deal vote: Opposing groups of protesters gather by parliament A pro-Brexit protester in Parliament Square Getty Brexit deal vote: Opposing groups of protesters gather by parliament Opposing protesters share the space outside parliament Getty Brexit deal vote: Opposing groups of protesters gather by parliament An anti-Brexit protester holds EU balloons outside parliament Reuters Brexit deal vote: Opposing groups of protesters gather by parliament Anti-Brexit protesters stand on Westminster Bridge PA Brexit deal vote: Opposing groups of protesters gather by parliament Former Ukip leader Nigel Farage speaks to the media at the protests outside parliament Reuters Brexit deal vote: Opposing groups of protesters gather by parliament Anti-Brexit protesters demonstrate outside the Houses of Parliament EPA Brexit deal vote: Opposing groups of protesters gather by parliament A pro-Brexit protester sets up outside parliament Reuters Brexit deal vote: Opposing groups of protesters gather by parliament An Avaaz campaigner holds a People’s Vote life float Reuters Brexit deal vote: Opposing groups of protesters gather by parliament A demonstrator holds a sign advocating a no-deal Brexit outside parliament AFP/Getty Brexit deal vote: Opposing groups of protesters gather by parliament An anti-Brexit protester waves an EU flag on Westminster Bridge PA Brexit deal vote: Opposing groups of protesters gather by parliament Protesters of opposing sides demonstrate outside parliament AFP/Getty Brexit deal vote: Opposing groups of protesters gather by parliament Protesters of opposing sides stand near parliament Reuters

One online advert asked: “Turkey’s 76 millon people are joining the EU – good news???”.

And a campaign poster said: “Turkey (population 76 million) is joining the EU. Vote Leave, take back control.”

Responding to Mr Johnson’s latest claims, Labour MP Virendra Sharma, a supporter of the Best for Britain campaign, said: “Boris puts the moron in oxymoron. He’s now trying to act the great liberal by championing migration, after shamelessly pushing anti-Turkish messages as a leader of the Vote Leave campaign.

“But the government must love it when he gets up and gives these speeches. He’s a helpful clown, distracting from the government’s failures by pushing a no deal that parliament won’t let happen.