THE SNP is facing a “pretty critical moment” with decisive action needed, or it “will be in trouble”, Kate Forbes says.

The former Holyrood finance secretary spoke out as police investigations into the party’s finances continued.

Former chief executive Peter Murrell – who is married to Sturgeon – was arrested and questioned, before being later released without charge, with the couple’s home also being searched by officers.

On Tuesday, Police Scotland also arrested SNP treasurer Colin Beattie, also the MSP for Midlothian North and Musselburgh, as part of Police Scotland’s ongoing investigation.

With the SNP also confirming it is currently without auditors after accountants Johnston Carmichael quit last year, with no replacement as yet being found, Forbes said there were “questions over integrity, trust, transparency”.

The former finance secretary spoke to BBC Radio 4 in her first broadcast interview since losing the leadership election.

She told the Leading Scotland Where? programme, which airs on Wednesday evening, that “right now, people are watching with astonishment, but they want to see leadership in dealing with it and resolving it”.

Claims about the party’s finances had been “mind-blowing”, she said.

Forbes was clear: “I think we need decisive and quick action or we will be in trouble.”

Speaking about the party’s situation, she added: “I think right now, people are watching with astonishment, but they want to see leadership in dealing with it and resolving it.”

She said that the SNP was “trusted” on various policy areas, adding: “What the people of Scotland want is good education, a good functioning NHS, a growing, well performing economy.

READ MORE: Kate Forbes: Achieving equality, opportunity and community needs more than rhetoric

“These are the issues that matter. And if we can fix and sort the problems within our own party quickly and ensure we are delivering on those external issues, then I think we can continue to build on the trust and success.

“The danger will be if there is an absence of decisive and quick action.”

She continued: “We are at a pretty critical moment and it will be the response and the reaction that determines how big a problem this is for the SNP.”

Forbes stated: “Right now with questions over integrity, trust, transparency – I think voters are watching extremely carefully.

“We perhaps have the next election in the early part of next year.

“They will vote in that election on the basis of how we have sorted out our internal problems – even more than that, how we govern.

“There is still time to sort it out. But, I said throughout the campaign, I’m afraid I’m going to say it now – continuity won’t cut it”.

Speaking about Sturgeon and Murrell, she said the couple were “obviously a very good team in the sense of managing the SNP”.

But she added: “There’s no question that since then there have been lots of questions about transparency, the integrity of the systems and structures, and it doesn’t matter how slick the optics are – you need good governance.”

An SNP spokesman said: “Under the fresh leadership of Humza Yousaf, the SNP has put in place the mechanisms to improve transparency and governance within the party.

“Undoubtedly, the last week has been tough for party members but Humza Yousaf is working hard to maintain the strong trust Scottish voters have placed in the SNP at election after election in recent years.”