Is the Sun already turning against Cameron?

It's a shame that

a) all us Labour people have stopped buying the Sun since it turned against us (or we just buy one to rip up in the style of Tony Woodley)

and

b) that Rupert Murdoch is such a Luddite when it comes to free content on the Internet that this article isn't linkable to online

because you'll just have to take my word for it that there's an absolutely searing attack on Cameron and the Tories in today's Sun by former editor Kelvin MacKenzie.

He asks why Cameron is only on 37% in the polls when Michael Howard was on 33% "when we were all billionaires".

He concludes it is because Zac Goldsmith "represents the rich boys club which so dominates the leadership of the Tory Party ... I worry that they don't really understand the ordinary working man and woman in this country ... The trouble is, I'm not sure that the Tories haven't simply become a Jobcentre Plus for Old Etonians. Gordon Brown has made a terrible hash of things but his heart has always been in the right place. If the Tories want to run our country, they must prove to the electorate that the heart is not something simply next to the wallet."

Seems like the PM's attack at PMQs on the Old Etonian wing of the Tories has not gone down too badly with the spiritual heirs to the Norman Tebbit wing of Toryism.

MacKenzie won't have written this article without clearance higher up in the News International hierarchy. Extraordinary that they have on a day when Mandelson has been attacking them.

Is the Sun's honeymoon with Cameron going to be the shortest on record?

What has Dave done to upset Rupert and his gang?

Does Rupert want to see a repeat of the leadership coup in Australia's Liberal Party (i.e. their Tories) where climate change deniers ousted centrist leader Malcolm Turnbull, who was looking to pursue green policies, replacing him with a hardline rightwinger?

Just this once it is worth gritting your teeth and buying a copy of the Sun to read the whole thing (hopefully that plea will stop News International from suing me for quoting from their precious intellectual property) - who knows if the circulation spikes they might reconsider their overall editorial stance on the next election?