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David Cameron took to Twitter today to declare the Labour party under Jeremy Corbyn a 'threat to national security.'

Many readers may have got a feeling of deja vu when they hear the Prime Minister's words - and with good reason.

As soon as Jeremy Corbyn's election was confirmed, every Tory Minister available was shoved in front of a microphone to parrot the phrase - with often hilarious results.

Defence secretary Michael Fallon said it THREE times in a short interview with the BBC.

And Employment minister Priti Patel was mocked for using the word 'security' (by our count) ELEVEN times in a four minute interview with LBC Radio's Ian Dale.

Even Michael Gove delivered the script word-for-word when he went on the Andrew Marr show this morning.

It's not just been used on broadcast appearances - and it's not just about Jeremy Corbyn.

Here's just a few of the dozens of occasions Tory Twitter accounts have used the word 'security' in the last couple of months.

So what's with the Tories suddenly saying 'security' all the time?

(Image: PA)

'Security' is the new 'Long Term Economic Plan.'

Ahead of the General Election, people started to notice a long and rather clunky phrase showing up in Tory TV appearances, and in use on the floor of the House of Commons. That phrase was 'Long Term Economic Plan.'

According to Parliamentary records, the phrase Long Term Economic Plan has been uttered 607 times in the House of Commons alone.

And that's not counting the times it's been said on telly - particularly on BBC Question Time, where it became a running joke.

But by the time people started to noticed the parrot-fashion phrase, it'd been repeated so often the message had been absorbed.

And the image of fiscal competence it created around the party helped the Tories secure victory in the 2015 general election.

The phrase was introduced by George Osborne, the Tories' strategy mastermind - and 'security' is his follow up hit.

He first used the phrase during his 2015 budget speech - delivering variations on the word THIRTY times in a little over an hour.

And you're going to hear it an awful lot more over the next five years.

So it's not really anything to do with Corbyn?

(Image: The Picture Library Ltd)

No. It's entirely about building a positive perception of the Conservative party at the expense of everyone else.

The strategy is to make the Tories seen as the party of 'security' during their second term in Government.

They want to be seen as a safe bet and for everyone else to be seen as a gamble.

That doesn't just mean going on about how the Tories 'put security first' - it means declaring everyone else a 'threat' to security.

And that's exactly what they're doing.

In an article for the Times late last month attacking Corbyn, David Cameron used the word six times.

[Economic stability] is what makes it possible to deliver the security we all yearn for. At the heart of our election manifesto was that simple goal: to give people security… Security is formed of many things… getting the training you need to secure a worthwhile career… The most important source of security is a well-paid job… It’s that combination of recovery and reform that will enable us to help those who often have the least security“

And the next day George Osborne used the S-word eight times in an article for the Sun.

“This is a Government that puts security first – our national security and our economic security… that consensus, which is so important for our security and reliability as an ally, risks being shattered…The UK’s future security is threatened… the return of the unilateralists to British politics threatens our nation’s future security… For the new unilateralists of British politics are a threat to our future national security and to our economic security”

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That's not particularly subtle

It's not, no.

But get used to it.

We're fairly certain you'll hear the word 'security' coming out of the mouth of every Tory MP who steps in front of a camera between now and the next election.

But are you going to let George Osborne brainwash you?