Nicola Sturgeon will lay out further details next week of the Scottish Government's plans for a second independence referendum.
The First Minister is set to address MSPs at Holyrood over next steps towards holding a vote in 2023.
It comes after Sturgeon and Green minister Patrick Harvie set out plans last week on how an independent Scotland will compare to other countries.
The SNP leader will make a statement at around 2.20pm on a 'route map' for a referendum then take questions from MSPs for around an hour.
Constitution Secretary Angus Robertson last week the Scottish Government was working towards holding a vote in October next year.
But SNP ministers have so far failed to formally request a Section 30 order from the UK Government - the legal mechanism that would allow Holyrood to stage a referendum without fear of a challenge in court.
Scottish Conservative MSP Donald Cameron said: "The Scottish public are sick and tired of the SNP’s obsession with independence.
"In the last week before summer recess, people want to hear their MSPs discussing the issues that really matter to them – not yet another speech on independence from Nicola Sturgeon.
"With the cost of living spiralling, Scotland’s NHS facing an unprecedented crisis, and our economy still struggling to recover from the pandemic, this debate is an unjustifiable waste of time.
Once again, Nicola Sturgeon has blatantly ignored Scotland’s real priorities to promote an unwanted second referendum."
Following the press conference in Bute House last week, the PM's spokesperson said: "The UK government’s position is that now is not the time to be talking about another referendum.
“We are confident that the people of Scotland want and expect their governments to be working together to focus on issues like the global cost of living challenges, like the war in Europe and the issues that matter to their families and their communities.”
But Sturgeon said she was willing to negotiate with Johnson over a vote.
She added: "I make it clear again Prime Minister, I stand ready to negotiate a section 30 order if you decide that you now are a democrat.
“I have to say, the evidence of that up to date is not promising, but I’ll say to what we do in those circumstances if he continues to deny democracy very soon.
“I’ve said I will set out a lawful way forward without a section 30, if that is what is required.”
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