A COMPLAINT to the BBC over Ruth Davidson questioning whether the Sturgeon-Salmond affair had “corrupted” Scotland’s institutions has been dragging on for three months and has been referred to the regulator after the broadcaster dismissed it.

John Parker, a reader of The ­National who is English by birth but whose home for years has been Wales, contacted the BBC after ­Davidson ­appeared on The World at One (WATO) on February 24 ahead of Salmond’s anticipated, but postponed, appearance before the ­committee investigating the Scottish Government’s handling of ­harassment allegations against him.

“Having successfully complained to the BBC before now (Nigel Lawson being allowed to air climate ­denial talking points unchallenged on the Today programme, August 2017) I ­decided to do so again,” said Parker.

“The [Salmond] story was given some 12 minutes and top-of-the-­agenda status.

“The sole interviewee, Ruth ­Davidson, was allowed for over five minutes to make insinuations of ­institutional corruption, an SNP ­cover-up and malfeasance by ­Sturgeon, with no serious attempt made to challenge her or present any alternative ­construction of events.”

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In the interview, Davidson said there were questions to be asked about whether Scotland’s democratic institutions were corrupt, which had minutes before formed part of political correspondent Nick Eardley’s news report. Davidson’s interview was followed by a report from the BBC’s Scotland editor Sarah Smith.

Parker, who is not an SNP member, recorded and transcribed the entire programme segment, and said: “All in all, a very one sided and tendentious presentation to be making with Holyrood elections just a few weeks away.

“My complaint was rebuffed at all levels up to and including Executive Complaints Unit (ECU). I didn’t feel the rebuttals reasonably addressed my concern, some of the arguments made being quite jaw dropping.”

On April 25 he raised the complaint with Ofcom, who are yet to respond.

In his original complaint, Parker said Davidson’s claims were “unsubstantiated”, telling them: “You cannot seriously claim to be covering this ­story properly, or to have much interest in actually explaining it, if she is the only person you interview.

“It was only later when I tuned into the BBC Scottish news that I realised that one reason for the non-publication/redaction of evidence that so ­exercises Davidson is the protection of the victims in the case. Why did you not point any of this out?”

In response, the BBC said it would be “fair to suggest” that presenter Sara Montague was “courteous” in ­allowing Davidson to respond to questions, and reassured him “there is no ulterior motive in either ­challenging or not challenging specific points on any occasion”.

They closed down Parker’s ­complaint after he contacted them again, but he then raised it with the Executive Complaints Unit (ECU), telling them: “The World at One ­report was defective and unbalanced, and Sarah Smith ... exhibits a bias that is unacceptable.”

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Dismissing the complaint, ECU complaints director, Colin Tregear, said: “I do not believe there are grounds for me to uphold your ­complaint. There is no further right of appeal against this decision ... it is open to you to ask the broadcasting regulator, Ofcom, to consider your complaint.

Ofcom said yesterday: “The BBC’s World at One case is still ­under ­assessment. We’ll publish our ­decision in due course.”