The firm that audits the SNP's financial accounts has resigned following a police raid on Nicola Sturgeon’s home.

Johnston Carmichael, an accountancy firm, has worked with the party for more than a decade but said it was ending the relationship following a review of its client portfolio.

Peter Murrell, Ms Sturgeon’s husband, was arrested this week following a long-running probe into the SNP’s finances. He was released without charge, following 11 hours of questioning, while the probe continues.

A spokesperson for the SNP told the BBC that the party was in the process of finding a replacement firm. A raid of the party’s headquarters in Edinburgh was also carried out this week.

The party has until July 7 to present their accounts to the Electoral Commission or face possible sanctions.

On Thursday, Humza Yousaf, the party leader, insisted that the party was in “good financial health” but admitted “I want it to be better.”

More to come.