Opinion polling for the 2014 Scottish independence referendum
This page lists the public opinion polls that were conducted in relation to the 2014 Scottish independence referendum, that was held on 18 September 2014. Overall, polls showed that support for a "No" vote was dominant until the end of August 2014, when support for a "Yes" vote gained momentum and the gap closed significantly, with at least one poll placing the "Yes" vote ahead.
Source: Wikipedia — Opinion polling for the 2014 Scottish independence referendum (CC BY-SA 4.0)