Boris Johnson will march into Labour’s heartlands on Monday, amid growing confidence that a repeat of the “roar” that helped deliver Brexit will carry him to a general election victory this week.

The prime minister will target Labour voters, including in Sunderland, which shocked the nation when 61 per cent of voters backed Leave in 2016, in one of the first results declared.

The decision to campaign in traditional Labour areas, including Grimsby, comes on the back of an exclusive poll for The Independent suggesting a Tory victory remains the likely outcome.

“It’s now been 1,264 days since Sunderland’s roar was heard on the night of 23 June 2016,” Mr Johnson will say.

Making the audacious promise to “make sure Sunderland’s voice will be heard in the corridors of Westminster and Whitehall like never before”, he will tell its voters they now have “three days to break the deadlock and avoid a hung parliament”.

With just days of campaigning left, Labour will promise a Budget to “end austerity” and “get investment flowing to neglected communities” within 100 days of taking office.

The Liberal Democrats, meanwhile, will unveil “ready-to-go legislation” that could “stop Boris and stop Brexit”, as soon as parliament returns after the election.

Earlier, Jo Swinson, the Lib Dem leader, said she could back Labour in a hung parliament, to secure a Final Say referendum, if Mr Corbyn agreed to stand down.

Top 10 marginal seats to watch at the general election Show all 10 1 /10 Top 10 marginal seats to watch at the general election Top 10 marginal seats to watch at the general election North East Fife Currently held by the SNP with a majority of 2 Getty Top 10 marginal seats to watch at the general election Kensington Currently held by Labour with a majority of 20 Getty Top 10 marginal seats to watch at the general election Perth and North Perthshire Currently held by the SNP with a majority of 21 Getty Top 10 marginal seats to watch at the general election Dudley North Currently held by independent, formerly Labour, MP Ian Austin with a majority of 22 LivingInMediocrity Top 10 marginal seats to watch at the general election Newcastle-under-Lyme Currently held by Labour with a majority of 30 Derek Harper Top 10 marginal seats to watch at the general election Southampton Itchen Currently held by the Conservatives with a majority of 31 Rob Candish Top 10 marginal seats to watch at the general election Richmond Park Currently held by the Conservatives with a majority of 45 Robin Webster Top 10 marginal seats to watch at the general election Crewe and Nantwich Currently held by Labour with a majority of 48 Jaggery Top 10 marginal seats to watch at the general election Glasgow South West Currently held by the SNP with a majority of 60 Alec MacKinnon Top 10 marginal seats to watch at the general election Glasgow East Currently held by the SNP with a majority of 75 Christine Johnstone

However, he was buoyed by a string of favourable polls, including the one for The Independent which gave the Tories a nine-point lead.

With the finishing point in sight, the prime minister will visit every English region and Wales in the coming days, to ram home the much-ridiculed claim that he can “get Brexit done” next month.

“Either we will have another hung parliament, with Jeremy Corbyn and Nicola Sturgeon conspiring to frustrate Brexit again,” Mr Johnson will say.

“Alternatively, we can have a Conservative majority government,” he will argue, adding: “Then we can move on.”

But John McDonnell, the shadow chancellor, will seek to ram home that Labour is ready to move on quickly from Brexit to domestic priorities, with a quickfire Budget within 100 days.

It would also “begin the process of bringing key utilities into public ownership under democratic management” and of moving power out of London to the regions.

The party plans a National Investment Bank and regional development banks, charged with delivering a “Green industrial revolution” to tackle the climate emergency.

“When Labour puts money in your pockets, we will also put power back in your hands,” Mr McDonnell will say, at an event in London.

“In our first hundred days we will start the process of bringing water and energy into public ownership.