Moment ex-Prime Minister Theresa May spotted on Ring doorbell while canvassing on Scots street

“ARMAGEDDON” was the word used by one Tory minister when asked how the UK-wide campaign was going.

It is a picture seen across the country - as Tory candidates scramble to shore-up collapsing support including, even, Rishi Sunak, with reports claiming his North Yorkshire seat is at risk of turning red in what would be an historic embarrassment.

And Nigel Farage’s Reform UK are making the Tory picture even darker. One senior Tory source told the Scottish Sun: “Nationally, it’s armageddon. All about Reform and immigration.”

In Scotland, rumours suggest some Scottish Tories are resigned to the fact that their leader Douglas Ross is “toast” - with SNP figures throwing everything they can at the seat.

While in the Central Belt it is the Nats on the ropes. One senior Scottish Labour source told us: “I think it’s fair to say Labour members haven’t always enjoyed General Election campaigns quite like they are enjoying this for a long time.

“There is a big sense of no complacency, every single conversation, every single switcher matters. Even in seats where it looks really good, people aren’t getting carried away - it’s very focused.”

Polls suggest Scottish Labour will overtake the SNP as the largest party in Scotland - a result which would symbolise the end to a decade of dominance for the party.

And Scottish Lib Dem insiders are confident of overhauling the Nats at a Westminster level - and are even eyeing up the possibility of becoming the official opposition and beating the Tories to second.

One senior party source said: “I think it’s a stretch but not insane now”.

And with eyes firmly set on winning six seats - with Inverness, Skye and West Ross-shire now “nailed on”, they added: “There is a potential for a big shock and for becoming the party of the Highlands again.”

But an SNP source claimed the party was feeling “buoyant” and that their supporters were sticking with them.

They said: “People feel good about John Swinney being leader now, and there isn’t really any enthusiasm for Labour’s offer under Keir Starmer.

"The general feeling is that we have the momentum.”

And another senior Nats source said: “It’s going to be closer than folk think, we have absolutely clawed back in last two weeks.”

It’s a cliche that a week is a long time in politics and a lot can change, but even just four days can feel a lifetime in a General Election campaign.