Foreign Office Minister Alan Duncan has said his boss Boris Johnson wanted to lose the referendum and only campaigned for Brexit to become the Tory ‘heir apparent’.

Mr Duncan, who campaigned for Remain, told a BBC documentary to be broadcast on Thursday night: “I’ve always thought that Boris’s wish was to lose by one so that he could be the heir apparent without having to have all the… you know, s-h-1-t of clearing up all the mess, that’s always been my view of Boris.”

In comments recorded the day before the referendum took place, Mr Duncan predicted Remain would win by 52 to 48 per cent and said: “By championing leave, Boris can be the great heir apparent of the future, darling of the activists, but actually it would be quite good if he didn’t actually win the referendum because there would be total chaos.”

Mr Duncan has since been appointed as Minister of State at the Foreign Office, working under Mr Johnson, who was appointed Foreign Secretary by Theresa May. It is far from the only example of words said during the referendum that will be hard to live down. Two weeks before their appointment to the same department, Mr Duncan also referred to Mr Johnson in the House of Commons as ‘Silvio Borisconi.’

Mr Johnson’s now counterpart at the Home Office, Amber Rudd, also told a televised debate she “wouldn’t get in the car with him at the end of the night”.

Brexit: A Very British coup? also features Jacob Rees-Mogg being forced to switch allegiance between three different candidates in the Conservative leadership election.

Brexit racism and the fightback Show all 9 1 /9 Brexit racism and the fightback Brexit racism and the fightback Demonstrators protest against an increase in post-ref racism at London's March for Europe in July 2016 PA Brexit racism and the fightback These cards were found near a school in Huntingdon, Cambridgeshire, the day after the EU referendum Twitter/@howgilb Brexit racism and the fightback LONDON, UK - JULY 16 : A speaker addresses the EDL members at Hyde Park. About a hundred members of The English Defence League (EDL) march on Park Lane for a rally in Hyde Park. The march on 16 July 2016 was heavily policed keeping the group away from the public. (Photo by David Mbiyu/Corbis via Getty Images) Getty Brexit racism and the fightback Romford, Essex, June 25 @diamondgeezer Brexit racism and the fightback A worker at this Romanian food shop was asleep upstairs at the time of this arson attack in Norwich on July 8, but escaped unharmed. Hundreds later participated in a ‘love bombing’ rally outside the shop to express their opposition to racism and their support of the shop owners. JustGiving/Helen Linehan Brexit racism and the fightback This neo-Nazi sticker was spotted in Glasgow on June 26 Courtesy of Eoin Palmer Brexit racism and the fightback But after news emerged of neo-Nazi stickers appearing in Glasgow, some in the city struck back with slogans of their own. Courtesy of Eoin Palmer Brexit racism and the fightback The Peoples Assembly Against Austerity, Black Live Matters and The Socialist Workers Party organised a march on Saturday July 16th in London, United Kingdom, against austerity, cuts and Racism. The groups also marched in solidarity against Tory government policies. (Photo by Gail Orenstein/NurPhoto via Getty Images) Getty Brexit racism and the fightback More signs began to appear in some parts of the UK, created by people who wanted to show their opposition to post-referendum racism Courtesy of Bernadette Russell

On 29 June, when asked by an interviewer who he is backing in the leadership bid he replies: ‘‘Oh Boris, I think Boris won the referendum for Brexit.’’

The following day he says: “I have always wanted Michael Gove to stand for the leadership of the [Conservative] party and I had encouraged him to do this.”

Theresa May tells UN the UK will not turn inwards after Brexit vote

On 20 July he tells an interviewer: “I’m a complete convert to Mrs May.”

Two weeks before the referendum, when Michael Heseltine calls Ukip “anti-immigration and racist”, Nigel Farage responds: “Typical disgraceful, disgraceful old man, he should be in the Natural History Museum. Listening to him reminded me why I resigned from the Conservative Party and that cheered me up. I made the right decision.”

Liam Fox, now Secretary of State for International Trade also calls for Remain campaigners not to make political capital out of the killing of Jo Cox, even calling for the referendum to be postponed: “I hope that we’ll not be hearing people use a tragedy of this proportion to try to change the political tone or alter the political weather,” he tells an interviewer. “I think there’s a strong argument to consider, at least next week, as to whether we want to extend the period of the referendum itself.”