Still, Wilcox said there was no immediate evidence of a sexual encounter gone wrong, of suicidal intent, or that Williams’ death was linked to a supposed interest in bondage. She said, however, that tales about his sex life could have been fueled in an attempt to “manipulate the evidence.’’

In the past, spy recruits were often cautioned that their sex lives could make them vulnerable to blackmail.

The case has frustrated Scotland Yard detectives who have been investigating the case for 21 months now and say that the secrecy surrounding Williams’ job has thwarted their efforts.

“Obviously a lot of information has come out through the course of this inquest which we have not been party to,’’ lead detective Jackie Sebire said.

But Wilcox also criticized the police detectives.

Time and resources were wasted, she said, when forensic teams investigating a DNA sample taken from Williams’s hand later turned out to belong to one of the forensic scientists. She also questioned the handling of William’s iPhone, which contained deleted images of him naked in a pair of boots.

Detective Superintendent Michael Broster, who was the police liason with MI6, said he had seized it from the spy’s workplace and kept it until the next day when he gave it to another officer.

“I find this is either not what occurred … or it demonstrates disregard for the rules governing continuity of evidence,’’ Wilcox said.

Wilcox also criticized officers who interviewed Williams’ colleagues without taking any formal statements.

“I find that this did affect the quality of evidence that was heard before this court,’’ she said.

Still, the coroner said she had seen no evidence to indicate his death was linked to his work.