In 2012, the campaign for Scottish independence began its first referendum. The case to remain in the UK was made by the British establishment, along with the main UK parties and very nearly the entire UK media. They unofficially called themselves 'Project Fear'. Opposing them was the largest grassroots movement in British history.
The result in Septemner 2014 was a 55% vote to remain in the UK. However, the lead of the 'No' vote had dropped by around 20% in the time.
Arguably, the referendum was won using illegal tactics, as well as a plethora of promises that were instantly reneged upon after the vote.