Even we can’t quite believe this one, readers.

Good grief, where do we even start?

Let’s try taking it one thing at a time.

1. Having the leader of your supposed mortal enemy appear to be your frontman, making your (real) arguments for you. Wow. All the wow. Wow Plus. Wow Max.

2. Nobody believes you. Just shouting it some more won’t work.

3. It’s really hard to convince people that the Tories desperately want the SNP to win votes when the Tories have just launched not one but TWO posters saying “Don’t vote for the SNP, because it’ll let Labour in”.

All you’re achieving between you there is to tell people that BOTH of the big two parties are terrified of an SNP vote, at exactly the moment in history when the electorate is actively looking for ways to punish the big two parties. Genius.

4. The core premise is a complete, obvious and provable lie. It is categorically NOT “a simple fact that the single biggest party gets to form a government”. Labour negotiated for a coalition in 2010 despite having fewer seats than the Conservatives. Labour’s own Lord Mandelson pointed out why:

There is NO rule, even a convention, that says the biggest party gets first dibs in the event of a hung Parliament. Shortly after that 2010 election a UK government paper discussed the procedures. Here’s part of page 17:

Paragraph 2.12 of the official Cabinet Manual published in 2011 confirmed it:

And even if you do get first try after that, you still have to win a vote. If the SNP held the balance of power and didn’t back the Tories – as they’ve unequivocally said they won’t – then the Tories don’t get to form the government.

If challenged by any even quarter-competent journalist, Labour will have no option but to admit that the claim is totally untrue. (And this isn’t the referendum any more – someone actually might make that challenge.)

5. By a small but clear margin, Scottish voters in the seats Labour is defending – including more than a third of Labour’s own supporters – would rather have David Cameron as the Prime Minister than Ed Miliband anyway. They’d probably rather have the Plasticine model of Wallace as Prime Minister than Ed Miliband.

What the video is in fact saying, therefore, is “Don’t vote SNP or you risk getting the Prime Minister you’d actually prefer”.

6. Scotland voted massively Labour in 2010, but got a Tory government anyway. The same thing also happened in 1992, 1987, 1983 and 1979. People aren’t total idiots, and they do remember that voting Labour is no protection from the Tories. Voting in dozens of SNP MPs is at least an approach they haven’t tried yet.

7. The SNP have expressly ruled out any deal with the Tories. Labour haven’t.

8. And we haven’t even begun on the sheer patheticness of the message you’re sending voters when all you’ve got to offer by way of a sales pitch is “Don’t vote for the party you want, because your democracy is such a broken stitch-up that your only real choice is between two other parties you despise”.

We’re reeling, folks. Actually reeling. We’ve downloaded that video for safekeeping, because unless the last of the kangaroos has finally escaped Labour’s paddock and thrown itself off a cliff it’ll be gone by the end of the day.