Alistair Darling has launched the campaign to keep Scotland in the United Kingdom.
He spoke to our reporter Kathryn Samson about why he is backing it:
The campaign to keep Scotland as part of the United Kingdom has been launched in Edinburgh. It's being led by Former UK Chancellor Alistair Darling who's warning that if Scotland leaves Britain, there's no way back. Kathryn Samson was there
The campaign against Scottish Independence is starting today.
It comes after Alex Salmond launched the campaign for a "yes" vote last month.
The Scottish referendum on full independence is due to take place sometime in the autumn of 2014.