Keir Starmer has shot down claims a majority of Scots voting SNP at the general election will be a mandate for independence.
The Labour leader also repeated his insistence of no deals with the Nationalists and accused the SNP of “faux patriotism”.
First Minister Nicola Sturgeon last week announced her Government will refer its indyref2 bill to the Supreme Court to rule on its legality.
Her plan B, in the event of the Court dismissing the Bill, is to turn the next general election into a “de facto” referendum on independence.
She has said that a majority of votes at the election would be a mandate of independence. However, Starmer dismissed Sturgeon’s framing of the next election as being solely about this one issue.
Asked what Labour would do if the SNP gets over 50 per cent of the vote at the next general election, he said: "I've answered that.
"It doesn't change the principal position. We go into that election making a case for change.
"We go into that election making the case for a Labour government for the whole United Kingdom. And in the local elections I came to Scotland and the thing that came up everywhere I went was the cost of living."
He also rejected Tory claims a minority Labour Government would do a deal with the SNP to get into power, saying: "No deals going into the election and no deals coming out of the election. And that's not the first time I've said it. I've said it every single time I've been asked about it.
"And I'll tell you why, there is no alliance to be forged with a party that wants to break up the United Kingdom. I want a Labour Government and I want to be the Prime Minister for the whole of the United Kingdom."
He continued: "There is no basis for an alliance with a party whose sole focus is on breaking up the United Kingdom, and therefore it's not going to happen. No deal in no deal out."
He added: "This faux patriotism that everything can be solved by putting a border between Scotland and England is completely wrong.”
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