MSPs at Holyrood voted to pass the First Minister's motion calling for a second referendum.
But the Prime Minister has said the UK government will not approve a second vote on Scotland's membership of the UK, at least until the country has left the EU.
The Scottish Parliament is expected to vote today for a second independence referendum.
The Scottish Greens are likely to support the SNP's call for Scotland to go to the polls again in late 2018 or early 2019. Prime Minister Theresa May has rejected the SNP's timeframe.
The vote was postponed last week following the Westminster terror attack.
We will have updates during the day and a special report in Lookaround tonight.
MSPs voted 69 to 59 to mandate the First Minister to seek permission from the UK Government for a ballot to be held.
Nicola Sturgeon has been speaking, as the Scottish Parliament votes on whether to push forward with a second referendum.