Keir Starmer was branded "just another Tony Blair" as the SNP conference kicked-off today with a scathing attack on Labour.
Keith Brown used his opening speech at the event in Aberdeen to claim his party had a "cast-iron mandate" to hold a second referendum on independence next year.
And the SNP deputy leader denied that a Labour government at Westminster would be an improvement on the Conservatives - claiming they could "not be trusted with our future".
It comes as a series of UK-wide polls show that Starmer's party now enjoys a substantial lead over the Tories.
Brown told delegates: "As bad as the Tories are – and they are atrocious – any suggestion that a Labour Westminster government will be better for Scotland is simply laughable.
"Keir Starmer is just another Tony Blair. Under Starmer, the Labour Party is as Trumpian as the Tories in their denial of Scottish democracy.
"It is an incontrovertible fact that the SNP has a cast-iron mandate to hold an independence referendum.
"But Labour always side with the Tories to protect Westminster control – no matter how high a price the people of Scotland pay.
"Labour supports the deeply damaging Brexit that Scotland did not vote for. I repeat, Labour supports Brexit, and stands against any Scottish aspiration for our country to re-join the European family of nations.
"And never forget, never forgive that, in 2014, it was Labour who championed the Better Together message that only a No vote would deliver economic stability.
"It seems absurd now, but that’s what Labour promised. They can’t be trusted with our future."
Tony Blair remains a divisive figure among many Scots voters due to his support for the Iraq war.
But he enjoyed substantial electoral success during his time as Labour leader when the party regularly elected more than 40 MPs in Scotland.
Starmer has made no secret of his admiration for Blair's election-winning abilities and quoted him during his Labour party conference speech last month.
He told Labour members their party was the "political wing of the British people" - a phrase previously used by Blair.
In an article for the Daily Record, Starmer also spelled out his opposition to an IndyRef2.
He said: “The next election is not going to be about independence. It’s going to be a choice between the disastrous record of the Tories over the last 12 years and change.
"In Aberdeen, Manchester, Liverpool, Dundee, London, Glasgow - in every town and city across these islands there is a majority for change."
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