"If you vote for us and we get our program through. we can be out at the absolute latest by January next year", Johnson said Thursday as he visited a hospital. It could also mean that Britain ends up in an economically damaging relationship with the European Union after an initial transition period, if talks between Johnson and the bloc to secure a free trade deal fail.
A Number 10 spokesman said the Prime Minister had not spoken to the US President about his Brexit deal which was "agreed after they were last in touch".
"And simply, it is not Brexit", Farage added.
However, the offer would only stand if Johnson chose to tear up the latest version of the UK-EU withdrawal deal.
Prime Minister Boris Johnson sought Thursday to blame the opposition Labour leader for his failure to deliver Brexit, as both men stepped up campaigning on the day Britain had been due to leave the EU.
"It'll be a tough election and we are going to do the best we can", he said during the meeting with Conservative MPs on Wednesday, adding that that it was time for Great Britain to "come together to get Brexit done".
The Brexit Party leader issued a warning to Johnson that the Brexit Party would use the entire election campaign ensuring that every home is aware that his withdrawal agreement is a "sell out".
Adam McDonnell, director of political research for YouGov, said the PM has managed to win over some Leave voters tempted to back Farage's party.
"No one party owns the Brexit vote, that even includes the Brexit Party", Farage said. The president, whose impeachment in the USA has moved a stage closer following a key vote in Congress, waded into the British election campaign on Thursday to criticise Johnson's divorce terms with the European bloc.
Your Halloween trick-or-treat forecast: Ghostly cold
Interim Leominster Police Chief Michael Goldman says moving the date of trick-or-treating will help keep the residents safe. High: low 50s. "Honestly, as long as I get candy, I'm fine with it", said trick-or-treater Jose Villasenor of Leominster.
When pushed on whether he would rule out a deal with Mr Farage, Mr Johnson replied: "I want to be very, very clear that voting for any other party than this government, this Conservative government... is basically tantamount to putting Jeremy Corbyn in".
The party had the funding in place to "contest every single seat in England, Scotland and Wales" if Johnson turned him down.
The Brexit party chairman, Richard Tice, spoke first at the event, listing the party's five areas of reform beyond Brexit, including abolishing the House of Lords and the potential for a written constitution.
Communities Secretary Robert Jenrick, said: "We are not interested in doing any pacts with the Brexit Party, or, indeed with anybody else". And he knows if Labour wins U.S. corporations won't get their hands on it.
Johnson had promised for months that the United Kingdom would leave the 28-nation bloc on the scheduled date of Oct 31 "come what may".
Johnson blames the opposition for the failure to leave the European Union on Thursday as scheduled.
The news that The Brexit Party is planning to field candidates across the country is unlikely to have a major impact in most East Anglian seats - but could influence the result in Ipswich.. It's not for us to have anything to do with your health care system.
Business leaders have claimed Labour's renationalisation plans of certain key industries, including the railways, would cost at least US$254 billion.