Police are investigating claims that signatures were forged on documents as part of their probe into SNP finances.

The Sunday Mail understand detectives have paperwork showing a name which the person denies having written themselves or having any knowledge of.

A source said: “There has been signatures on documents which the person named has made clear they did not write. It is one of a number of many strands to the investigation which remain under scrutiny.

“The documents are in relation to financial transactions which are being probed over the potential for fraud.”

Police have arrested and questioned former SNP CEO Peter Murrell, his wife and former SNP leader Nicola Sturgeon, and former party treasurer Colin Beattie. They were all released without charge.

Operation Branchform was formally launched in July 2021 following seven complaints about more than £600,000 of “ring-fenced” donations missing from the SNP’s accounts. The Sunday Mail first revealed in early 2021 that the accounts were under police scrutiny.

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