The Better Together campaign said the countdown to Scotland's independence referendum has begun after "months of unnecessary delay".
"We now have just over 18 months to go to win the arguments and win the referendum. We have already made huge strides ... However, we cannot for one minute assume that we have done enough", the campaign said on its website.
First Minister Alex Salmond has announced the long-awaited date of Scotland's independence referendum - 18th September, 2014.
Scotland's First Minister Alex Salmond will today announce the date for the country's referendum on independence.