IAN Blackford has written to Theresa May, calling for a meeting of party leaders over Tory "dark money" scandals.

The Prime Minister is facing new pressure, amid revelations that Vote Leave could have broken electoral law, and Scottish Conservatives accepting money from a secretive trust.

Blackford, the SNP's Westminster leader, has now written to May seeking a meeting of party leaders, and seeking clarification on any action she plans to take.

In his letter, he says the Prime Minister must ensure that if Vote Leave breached electoral laws, those responsible must be held accountable.

He also calls on the Tory leader to investigate links between her party, Vote Leave and the Scottish Unionist Association Trust (SUAT) – and to publish all donors and donations.

Commenting, Blackford said: “The Prime Minister must take action and ensure people are held accountable over dodgy donations – we need to have absolute transparency in elections so that the public can be confident that our democracy is not being bought.

“The claim that Vote Leave is expected to be found to have broken electoral law is very serious and it’s a damning accusation that potentially calls into question the validity of our democratic processes.

“So far, serious questions asked about the trail of murky donations have been met with a wall of silence from Scottish Tory leader, Ruth Davidson.

"It’s time for Ruth Davidson to be honest with the electorate about who funds her party, and why it has chosen to obscure donations in this way.

“At PMQs, Theresa May’s lack of response to my questions in relation to the controversy surrounding her own party’s conduct was a complete abdication of responsibility and requires addressing.

"I have called on the Prime Minister to urgently convene a meeting of arty peaders to address the issue, and work to ensure the public can have faith in our electoral process."

The Scottish Tories are currently caught up in two "dark money" scandals.

One relates to the pro-Brexit donations of Richard Cook, former vice-chairman of the party and former election candidate.

Cook is the public face of the Constitutional Research Council. It funnelled money through the DUP and to Brexit minister Steve Barker in his role as a chair of Jacob Rees-Mogg’s European Research Group.

Cook told the Sunday Herald last year that the CRC’s money came “only from eligible UK donors”. Asked if any Scots had donated to the CRC, he replied: “Yes.”

Quizzed on how many Scots had made financial contributions, he stated: “I shouldn’t have said yes there, so I am not going to go into any more.”

Asked how much money had been donated to the CRC since 2014, Cook said: “I’m not going to get into that.”

The other relates to SUAT, which, since 2001 has donated £318,876.66 to 15 local Conservative Party branches, and to MSP Jackson Carlaw and MPs David Duguid and Douglas Ross.

It has also loaned the party in East Renfrewshire £5000.

The trust says its money comes from the proceeds of selling property belonging to what was then the Scottish Unionist Association in the late 1960s, which has been wisely invested.