The spirit of D-Day will be evoked by the Prime Minister as he uses his key speech at the Scottish Conservative conference in Stirling as part of his battle against independence.
David Cameron will highlight the achievements Britain has made when its individual countries have worked together, drawing on the NHS, the invention of penicillin by Scot Alexander Fleming and the success of Team GB in last summer’s Olympics as examples of why the nation is “Better Together”.
The speech comes as Scotland’s First Minister Alex Salmond called on Mr Cameron to use his speech to apologise for using “fears and smears” in the independence debate.
Mr Cameron is expected to say: “Our United Kingdom’s history has always been one of shared endeavour. Proud in our individual identities but working together for a common good.
“We saw it when our soldiers fought together under one flag on the beaches of Normandy. We saw it when our doctors came together to build our NHS.
“We saw it in the scientific breakthroughs that we made together, from the television to penicillin. And we saw it last summer as athletes from around Britain no matter where they were from draped themselves in one flag.
“And there is still so much more to come. Why wouldn’t we want to face the future together?
“There is simply no challenge we face today where breaking up Britain is the right answer.
“The future I see for Scotland is part of a dynamic, enterprising, prosperous, compassionate Britain. A Britain that isn’t just competing in the global race but winning in the world.
“A country where we are pulling together, not pulling apart.”
However, Mr Salmond yesterday hit out at claims by the Prime Minister, Chancellor George Osborne and Chief Secretary to the Treasury Danny Alexander that the referendum debate has deterred inward investment into Scotland.
He said recent figures from Ernst & Young showed a large increase in such capital in the country, adding there is “no sign of investors being deterred from coming to Scotland (because of the possibility of independence) if anything, the reverse appears to be true”.
Mr Salmond also renewed his call to Mr Cameron to take part on a head-to-head referendum debate.
He said: “This week, the No campaign’s scaremongering has been exposed for the nonsense it is.
“The reality of the inward investment surge Scotland is achieving demolishes the wholly unsubstantiated claims that the referendum and prospect of independence deter investment.
“As the Ernst & Young report says, if anything, the opposite is the case.”