I want to give you a concrete example of how the UK government deliberately sets out to manufacture false sexual allegations against people it considers a threat. I do so to educate those who view this concept as an unthinkable “conspiracy theory”. I write of a case of which I have expert knowledge; it is my own case.

I became an “enemy of the state” when, as British Ambassador, I protested against UK and US complicity in torture and extraordinary rendition in Uzbekistan. As detailed in Murder in Samarkand, I very quickly found myself suspended and subject to civil service investigation of disciplinary allegations against me, the worst of which was that I extorted sex from visa applicants. Blair’s No. 10 quickly leaked this allegation against me to the Daily Mail.

I was in a state of complete shock. I had no idea at all what could have led to such allegations. The Kafkaesque nightmare deepened when I was presented with the evidence against me.

The case was of a young woman named Albina Safarova. I was shown her visa application documents by the investigating officer. These included her passport photo, and she was a strikingly beautiful young woman. On the back of her visa application the Visa Officer had written “HMA (Her Majesty’s Ambassador, i.e. me) authorises issue”. The investigation had obtained a statement from the Visa Officer, in which she stated that she had issued the Visa after being informed by two British diplomats that Ms Safarova was a friend of mine. To complete the evidence, the original application was supported by a letter from Ms Safarova’s sponsor, a Mr Dermot Hassett, who stated in the application that the circumstances of the application were known to the British Ambassador, Mr Craig Murray.

All of which seems firm and damning evidence of, at the least, unwarranted interference in visa issues.

Except for this. Not only had I never had any form of sexual encounter with Ms Albina Safarova, I had never met her or even heard of her. The same was true of Mr Dermot Hassett. Not only were they not my friends, I had no idea they existed.

After I left the FCO, I gave the papers to a veteran investigative reporter, Bob Graham, who contacted Dermot Hassett. Graham told me that Hassett explained that a British diplomat – one of the two who had told the Visa Officer Ms Safarova was my friend – had instructed him to write my name into the visa application, with the assurance that the visa would be granted.

So the British government had put substantial effort into the preparation of fake documents connecting me to Ms Safarova and Mr Hassett and this visa application. Yet the whole thing was entirely fake. Those British diplomats had lied, and convinced Mr Hassett and the Visa Officer to produce “independent” documents corroborating those lies.

Interestingly, they never produced any allegation from Ms Safarova that a sexual relationship was involved. In the absence of this and of any evidence that I had ever met Safarova, and in view of the fact the Visa Officer’s evidence crucially stated it was other British diplomats, not me, who told her Safarova was my friend, I was acquitted. No other incident was ever alleged. But mud sticks, and the smear was used to discredit my evidence on torture and extraordinary rendition, and has been so used ever since.

Alex Salmond is far more of a threat to the British establishment than I ever was. So is Julian Assange and so is Tommy Sheridan. Anybody who looks at any of these examples, and does not understand that the state will actually fabricate allegations and fabricate evidence to back them, is a fool.

I know. It happened to me.