Boris Johnson gave an interesting answer when it was put to him that there was a risk of a split in the Leave vote if he did not take up Nigel Farage’s offer of an electoral deal. The prime minister argued that he could not contemplate any such arrangement because a vote for any other party would risk letting Jeremy Corbyn in.

However, that could only happen if Conservative and Brexit Party candidates were to stand against each other. Mr Johnson’s reply seemed to support the case for reaching an understanding with Mr Farage rather than providing a reason for not doing so.

Meanwhile, those on the other side of the Brexit divide have launched a website that claimed to provide the best advice as