John Swinney told delegates on Saturday that the SNP would launch its "most sophisticated campaign in history" to convince Scots of the benefits of leaving the UK. The campaign, named Choose Scotland, aims to build consensus for independence and is funded by a six-figure war chest.
Swinney argued that nationalist first ministers of Wales, Scotland and Northern Ireland had unnerved pro-union parties. "For centuries, people in the Celtic nations have been told that we are not good enough," he said. "Never again can they portray us as separatists."
Leading SNP figures said a hung parliament was the most realistic route to securing a second referendum. Deputy first minister Jenny Gilruth said polling suggested the SNP would "hold the balance of power in a hung parliament", allowing the party to regain seats. Lara Bird, the MP for Arbroath and Broughty Ferry, told a podcast that the next general election offered a "really great opportunity", with the SNP polled to win between 40 and 50 MPs. "That's huge. Let's put it to Westminster and put the onus on them to meet us at the table," she said.
Latest MRP polling by Electoral Calculus predicts a narrow Labour victory with the SNP winning 28 seats, though other polls have suggested higher figures.
On a visit to Lanarkshire on Friday, UK prime minister Andy Burnham said the Scottish government needed to "move beyond" the constitutional question, while offering to work more closely on devolving power from Holyrood. The Westminster government would need to grant permission for a second independence vote.