Nicola Sturgeon says she knows “nothing more” about the police investigation into SNP finances.

The former first minister, who was arrested and released without charge last year, said she wished the inquiry “wasn’t there” but that she had no “control” over it.

She has vowed to co-operate fully with the authorities, and insisted she has done nothing wrong.

Former SNP chief executive Peter Murrell, Sturgeon’s husband, was charged with embezzling party funds in April.

Asked about the police investigation, codenamed Operation Branchform, the former SNP leader told BBC Scotland News: “It’s not something I have any control over and I don’t think it would be surprising to anybody to hear me say of course I wish it wasn’t there – but it is what it is and it will take its own course.

“In the meantime I’m getting on with my life, I’m enjoying getting on with my life and there’s no point in me talking about things I can’t comment on anyway.”

Operation Branchform has spent more than two years looking into what happened to £660,000 of donations given to the SNP by independence activists.

In September it emerged that officers had sent prosecutors details of what they had uncovered in an “advice and guidance report” and are seeking formal advice on what they should do next.

The update was understood to be about Sturgeon and ex-SNP treasurer Colin Beattie, who have both remained under investigation after being arrested and released without charge last year.

The Crown Office said at the time the police report was under consideration.

A spokesperson for Police Scotland said the force was awaiting direction from the Crown Office and Procurator Fiscal Service “on what further action should be taken”.

Sturgeon unexpectedly resigned as first minister in March 2023 after eight years in the role.

She denied her decision was influenced by the police investigation.

Asked if she missed being first minister, the ex-SNP leader told BBC Scotland News: “No I don’t.

“Don’t get me wrong, there are days I miss it, I miss the people I worked with. I miss aspects of the job.

“But I don’t miss it in the sense of wishing I was back there – most days I’ll have a moment of relief at some point that I’m not still in Bute House.

“Life is short for all of us and I’m looking forward to a new phase of life, a different phase of life, and leaving the stresses and strains of being first minister to other people.”

Having returned to the backbenches, Sturgeon has been criticised by opponents for speaking just four times in the chamber this year – one of which was to raise an issue about her voting app not working.

The Glasgow Southside MSP told BBC Scotland News she was focusing on constituency work.

“I will speak, whether in parliament or publicly, on things I care about and where I think my voice can make a difference,” she said.

“I think it is important for a former first minister not to constantly be getting in the way of those who come after them and I’ll always try not to do that.

“But I’ll speak up on the things I care about and the things I believe in and I’ll continue to stand up and fight for the things I believe in no matter how difficult or controversial at times that can be.”