Britain's former Prime Minister Gordon Brown and ex-Chancellor Alastair Darling made a last-ditch attempt to woo voters for the Better Together campaign ahead of Scots going to the polls to decide the future of their country on 18 September.
An Ipsos Mori poll for STV showed a seven-point surge in "Yes" support since last month but it was not enough to secure the top spot.
Currently, the "No" vote is at 51%, while the "Yes" vote at 49%.
Other polls by PanelBase and ICM have put the "No" vote in the lead by four points but is it enough to secure a victory for the union?
"We built the peace together, we built the health service together, we built the welfare state together, we will build the future together," said Brown.
"And what we have built together, by sacrificing and sharing, let no narrow nationalism split us under, ever."
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