Boris Johnson and Jeremy Corbyn will face off in a televised head-to-head this evening as they look to boost their support ahead of the December 12 vote.
The prime minister will be hoping to cement the lead he has been afforded by the polls so far, though Mr Corbyn will be rallying to close the gap after a recent poll saw the Tory advantage dip.
The debate, which will be aired on the BBC, comes after a tumultuous campaign for both parties, with Mr Johnson currently in the midst of a row with veteran BBC broadcaster Andrew Neil for refusing to do an interview on his show.
In a damning video in which he was accompanied by an empty chair, Mr Neil directly challenged the Conservative Party leader to face him to discuss the theme of "trust" and why some have "deemed him to be untrustworthy".
He has also been accused of avoiding ITV interviews, with the broadcaster claiming his team had been asked multiple times to do an interview with journalist Julie Etchingham, but had refused.
Meanwhile, the Labour Party has been forced to defend itself against further allegations of anti-Semitism after submissions were made to the Equality and Human Rights Commission.
Mr Corbyn has been forced to deny that the party has become a “welcoming refuge” for anti-Semites under his leadership.
Tonight's election set piece is the pair's second head-to-head of the election campaign after 6.7 million watched them row on ITV last month.
Mr Johnson narrowly won that battle, according to a snap poll which put him as the winner by 51 per cent to Mr Corbyn's 49.
Overnight it emerged that Mr Johnson has accused Mr Corbyn of a “sly” plan to “fiddle” a second Brexit referendum.
He said Mr Corbyn’s stance on the UK’s future with the EU has already done “serious harm” to trust in politics and urged his rival to reconsider his policy on the issue.
Mr Johnson wrote to the Labour leader: "Your policy is to cancel the result of the last referendum and to hold another one.
"You have made clear that you oppose an Australian-style points system and you will not only continue 'free movement' with the EU but your policy is extend it to the entire world.
"Even worse, your manifesto sets out plans to fiddle your second referendum on Brexit. You want to give two million EU nationals the vote in your referendum... This is a sly attempt to undermine the result of the 2016 referendum, and is profoundly undemocratic.”
Elsewhere, shadow chancellor John McDonnell has said Labour would not negotiate with smaller parties in the event of a hung parliament.
"We will implement our manifesto...no negotiation, no deal, no coalitions," he told the Financial Times.
The Lib Dems have previously indicated they would not go into coalition with either of the major parties, due to reservations over their leaders.
