02/05/2012 06:52 BST | Updated 02/05/2012 06:53 BST

Gareth Williams Death: Inquest To Rule Out 'Unlawful Killing'

The coroner investigating the death of MI6 spy Gareth Williams is to rule out unlawful killing as the cause of his death today.

Dr Fiona Wilcox will deliver the verdict on Wednesday afternoon, having presided over the week-long inquest into the mysterious death of the MI6 spy, who was found locked in a holdall in his bathroom.

Having heard all of the evidence, it is expected that Dr Wilcox will say that open and narrative verdicts are the only options available.

However, she added: "An open verdict would not do justice to the positive findings I can make."

Members of the high-flying codebreaker's family are expected to arrive at Westminster Coroner's Court before Dr Wilcox delivers her decision.

A near two-year long inquiry into the death of Mr William and how he ended up locked inside a bag has so far drawn no results.

Relatives were moved to tears during the inquest as police, scientists and secret agents said his death remained a mystery.

Dr Wilcox angrily attacked police and MI6 yesterday for evidence disclosure failures surrounding belongings left at Mr Williams's desk.

Nine computer memory sticks and a black bag were overlooked in the inquiry until the lead detective, Jackie Sebire, was made aware this week.

Ms Sebire said Scotland Yard will review lines of inquiry in its investigation in the wake of the inquest.

But police - who have recovered no evidence of a third party being present when he died - have no suspects in their inquiry.

Ms Sebire said she remained convinced that Mr Williams's death was suspicious.

"Obviously a lot of information has come out through the course of this inquest which we have not been party to," she said.

She said Mr Williams was a "brilliant young man who spent his entire life working for his country and was commended for it".

Added attention could turn on the expert mathematician's colleagues, she indicated.

Mr Williams, a 31-year-old fitness enthusiast originally from Anglesey, North Wales, was found naked, curled up in a padlocked holdall in the bath of his flat in Pimlico, central London, on 23 August, 2010.