THE LORD Advocate and Holyrood's presiding officer have a duty to challenge the SNP's plans for an "illegal" referendum, according to Douglas Ross.

At a press conference this morning, Mr Ross told The Herald that he believes it would be the responsibility of Scotland's top law officer to block a wildcat poll.

Asked if the Scottish Conservatives or other MSPs may consider challenging any plans for a referendum by the SNP, the Scottish conservatives leader said: "I would expect it to be challenged, first of all, by the Lord Advocate.

"I would expect the Lord Advocate to look at what the Scottish Government would be proposing for a wildcat illegal referendum and tell the Scottish Government they can't do that.

"Then look at the Presiding Officer, who would presumably rule that this was outwith the competence of the Scottish Parliament."

READ MORE: Ross challenges Sturgeon to face-off over referendum plans this year

He continued: "These are the areas that the SNP know full well the moment but they want to threaten this wildcat referendum to promote even more uncertainty, at a time when we need certainty in Scotland, simply to appease the SNP members and separatists.

"That's why I think it's absolutely unacceptable, and should be absolutely disowned by the First Minister.

"But if she won't rule it out if she won't say reckless irresponsible actions are nothing to do with her then she's got to defend it.

"She's got to explain to people why she thinks an illegal referendum, going through the courts is the way to go."

The Herald: Undated handout file photo of Conservative MP Douglas Ross who has apologised for saying his priority as prime minister would be to bring in ''tougher enforcement against gypsy travellers''. PRESS ASSOCIATION Photo. Issue date: Friday Augu

It comes after the MP for Moray this morning challenged Nicola Sturgeon to a debate over the SNP's plans to hold another referendum as early as this year.

Mike Russell MSP and Scottish Government's Constitution Secretary, published an 11-point routemap to independence last month, while party depute leader Keith Brown MSP announced it was launching an independence task force.

Asked why he was challenging the First Minister to a debate now, as opposed to one closer to the Holyrood elections, Mr Ross explained: " The reason for calling for it now is because the SNP have renewed their threats for another independence referendum with this 11 point plan, with this task force being assembled so I can't allow their arguments for separation to go unchallenged.

READ MORE: Mike Russell: IndyRef2 'could be held by Christmas'

"Surely if you have a plan, if you have a belief, if you think separation is the right way to go in the middle of a global pandemic when the country is still trying to recover from this health emergency, and then the economic response, you should be willing to stand up at any point and defend your cause.

"And that's exactly what I will do, defend the case of the United Kingdom and Scotland's place within it, if Nicola Sturgeon is willing to defend her separatist plans right now in the middle of a pandemic."