Henry David Bolton OBE (born 2 March 1963) is a former British politician who was the leader of the UK Independence Party (UKIP) from 29 September 2017 to 17 February 2018.

Bolton became UKIP leader after winning the party's 2017 leadership election, and gave himself the additional role of Defence spokesman in January 2018.

He subsequently announced plans to establish a new political party, to be called OneNation, that would adopt a Eurosceptic stance like UKIP.

[13] He said her candidacy was in violation of the party's rules of procedure as she was not considered to be 'in good standing' due to previous exclusions for elections.

[15] Subsequently, he was quoted by the press as saying that UKIP was in danger of becoming the "UK Nazi party" if the wrong candidate were elected as leader.

[16] Later in his leadership campaign, Bolton spoke of Britain's separation from the EU, saying that UKIP has "a moral responsibility to make sure Brexit is a success for everybody".

[17] Following his victory, on 28 September, Bolton said "Brexit is our core task", while separately declaring Islam a "concern",[18] although he believed an anti-Islam agenda would offer UKIP little gain.

[20] On 4 January 2018, it was reported that Bolton had left his wife and embarked on a relationship with Jo Marney, a model and party member nearly thirty years his junior.

[21][22] On 14 January it was reported that Marney had been suspended from UKIP following allegations that she had sent a series of SMS messages containing racist comments about Prince Harry's fiancée, Meghan Markle.

[24] The following day, Bolton announced he had ended his relationship with Marney,[25] but on 18 January the Evening Standard reported that the two continued to be seen in each other's company.

[28] In his resignation letter, he stated that he had lost confidence in Bolton, who he felt was "not the right person for the job" – but thought no better of those "jockeying" for position in the party.

[29] Bolton had made it clear earlier that day that he would not resign if the vote went against him, because he felt another leadership election would destroy the party.

UKIP education spokesman David Kurten commented that Bolton had no chance of surviving a vote of party members.

[33] On 6 March 2018, Bolton announced his intention to establish a new political party, OneNation, that would "campaign unceasingly for our full independence from the EU" and that would "mirror some of the changes that I sought to bring to UKIP".

[34] The registration application for OneNation was rejected by the Electoral Commission as "likely to mislead voters",[35] its name being the same as an existing Islamic relief charity.

A review in The New European commented that the book quoted from Sophocles, Shakespeare, and Einstein, but that nothing was as good as Jo Marney's explanation for claiming she felt like Anne Frank.