Voters are less likely to support Scottish independence if it means ditching the pound in favour of a new currency, polling suggests.
The survey by Survation also found Scots have concerns over whether leaving the UK would mean the creation of a hard border with England.
Support for independence has been above 50% in the last six opinion polls carried out this year, making the constitutional question a major talking point ahead of next year's Holyrood election.
But pro-Union campaigners believe many voters retain significant doubts about the realities of an independent Scotland, especially when it comes to the question of currency.
The Yes campaign at the 2014 independence referendum struggled to convince Scots they could still use the pound as normal even if they left the UK.
Then chancellor George Osbourne repeatedly ruled out the creation of a "Sterling Zone" between an independent Scotland and the rest of the UK, meaning the new state would have no say on interest rates.
A new poll - commissioned by Scotland in Union - found that 42% of voters would be less likely to vote for independence if it meant the pound was ditched in favour of a new currency, with 35% saying it would make no difference, and 16% saying it would make them more likely.
If a hard border was a cost of independence, 43% said they would be less likely to vote for it, 31% said it would make no difference and 18% said it would make them more likely.
Nicola Sturgeon last year pledged to be "frank and honest" with Scots about independence but refused to rule out the prospect of a "hard border" with England being introduced.
Asked about the subject in a BBC interview with Andrew Marr, she said: "I will be honest with the people of Scotland but that opens a situation where Scotland’s best interests depend on being independent and in charge of our own future.
"And I don’t want borders its not my policies that are putting borders anywhere."
SNP Depute Leader Keith Brown said: "The Westminster parties are panicking - they can’t even ask the straightforward independence question because they are so scared of the likely answer.
“That’s no surprise, with polling now consistently showing that majority support for independence is now becoming the settled will of the people of Scotland.
"There is absolutely nothing in the SNP’s proposition for an independent, internationalist and forward-looking Scotland that necessitates a hard border.
"And opponents of independence would claim any currency was the wrong one.
"Scotland will continue to use the pound at the point of independence, until it's in the interests of the economy to adopt a new currency.”
