The UK government is setting out its case for the Union, ahead of the 2014 Scottish independence referendum.
Westminster says it will explain in detail why people and companies in Scotland benefit from its place in the UK.
Scottish Secretary Michael Moore began outlining the Government's vision if the Union continues.
The government is making its case against Scottish Independence today.
David Cameron is releasing the first in a series of reports, highlighting how the UK and Scotland benefit from the union.
Speaking in an ITV Daybreak interview Stuart Maxwell from the Scottish National Party said the UK Government's report today showed a "breathtaking arrogance" over their "supposed" recognition of Scotland as an equal partner.
Advice on what will happen to Scotland if it became independent from the UK will be published today.
A summary of the report, issued from Downing Street ahead of the publication, revealed that it was an "unusual step" for the Government to publish full legal opinion from experts.
According to Professors James Crawford and Alan Boyle, who set out their opinions in the paper, Scotland would be treated as a new country, having to renegotiate its relationship with world bodies.
The Scottish Government issued a paper last week, which assuming a Yes vote occurred in autumn 2014, could see negotiations between Scottish ministers and the UK Government, EU and international organisations concluded by March 2016.
Today's publication does not include specific advice from the European Commission on the implications of Scottish independence in the EU.
David Cameron has launched a defence of the United Kingdom as his government prepares to put the "facts" about Scottish independence to the public.
While people in Scotland will make the decision in autumn next year, the implications will have obvious impacts across England, Wales and Northern Ireland, the Conservative leader said.
"Britain is admired around the world as a source of prosperity, power and security," he said.
"Those glorious Olympics last summer reminded us just what we were capable of when we pull together: Scottish, English, Welsh, Northern Irish, all in the same boat - sometimes literally.
"If you told many people watching those Olympics around the world that we were going to erect barriers between our people, they'd probably be baffled. Put simply: Britain works. Britain works well. Why break it?"
Cameron spoke out one day before the government publishes the first in a series of analysis papers about Scotland's role in the union.
Tobacco displays and vending machine sales will be banned in Scotland from 29th April, the Scottish Government has announced.
The laws will initially prevent large shops from openly displaying tobacco and will prohibit tobacco sales from self-service vending machines.
The announcement follows the defeat of a legal challenge by one of the world's biggest tobacco firms last December.
The same ban, which is set out in the Tobacco and Primary Medical Services (Scotland) Act 2010, will come into force for smaller retailers on 6th April 2015.
The Scottish Ambulance service are making an appeal to the Scottish Government, after plans for a new ambulance station at the Borders General Hospital were rejected.
The ambulance service want to replace the old depot in Galashiels with a new facility near the hospital in Melrose.
However, councillors rejected the plans due to 'landscaping' concerns, as they were worried the possible felling of trees would affect the scenic landscape of the Eildon hills.
Campaigners say that the new site would improve ambulance response times, which are below the current government target.
Dumfriesshire MSP Elaine Murray said she is 'relieved' that the Scottish Government is investing 36 million pounds to improve the safety of roads in the south of Scotland.
Major improvement works will take place on the A77 Symington to Bogend Toll, A75 Dunragit Bypass and the A75 Hardgrove to Kinmount.
Scottish Secretary Michael Moore, a Borders MP, has accused the Scottish Government of creating a distraction from the bigger issues.
The SNP say the paper puts pressure on the UK Government to open talks about the transition process before the vote in 2014.