By Jonathan Davies
Prime Minister David Cameron will tell business leaders that the "UK is an economy of opportunity" which supports millions of Scottish jobs, at tonight's CBI dinner.
In his speech, the Prime Minister will say: "This is one of the oldest and most successful single markets in the world.
"Scotland does twice as much trade with the rest of the UK than with the rest of the world put together - trade that helps to support one million Scottish jobs.
He will add: "This success doesn't happen by accident. It happens because of the skill of people in Scotland and the opportunities that come from being part of something bigger.
"A large domestic market, underpinned by a common currency, common taxes, common rules and regulations, with no borders, no transaction costs, no restrictions on the flow of goods, investment or people. Ours really is an economy of opportunity."
Scotland's First Minister, Alex Salmond, said: "The PM must use his visit to Scotland to say what powers Westminster is guaranteeing, to allow the job-creating businesses of Scotland to boost employment and the economy.
"And if he fails to do so, the choice is clear - a Yes vote which guarantees the powers Scotland's companies and entrepreneurs need to create jobs and opportunities for future generations of Scots, or a No vote which will deliver absolutely nothing.
"Independence isn't a magic wand but with a diverse economy, huge natural resources and a highly-educated workforce we have firm foundations on which to build a more prosperous country and fairer society."
Earlier today (Thursday), The Herald newspaper published an open letter signed by 200 business leaders supporting the case for Scottish independence.
It came a day after 130 business leaders signed a letter supporting the 'No' campaign.
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