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.
More top news
It is now believed that 45-year-old Robert Cantle may have travelled in his car to the Jedburgh area on Sunday morning.
A Cumbrian man has been jailed for 15 years after a police crime unit seized its biggest ever haul of firearms.
The historic event always takes place on the last Friday in July.