Scotland's First Secretary Alex Salmond has engaged in a heated press conference exchange with BBC News political editor Nick Robinson, who repeatedly asked him to answer his question on independence's potential impact on banking relocations.
Mr Robinson spoke out as Mr Salmond concluded his initial answer with an appeal to the BBC to name a Treasury source who he alleges briefed journalists on "market sensitive information" about Royal Bank of Scotland.
Mr Salmond said he has written to the Cabinet Secretary to demand an investigation into the apparent leaking of information about RBS.
One story dominates Thursday's front pages with some newspapers printing emotive pleas to voters to keep the United Kingdom as one.
In Edinburgh tonight you can hear it and feel it. The buzz, the banter of the day and the thrilling sense something big is coming tomorrow.
There is nervousness, anxiety and on the streets of Edinburgh fuelled by an atmosphere unlike anything seen before in recent UK politics.