Dr Fiona Wilcox notes she was receiving evidence from MI6 during the inquest, despite its claim to have handed over all relevant material already.
She adds the lack of signed statements from MI6 staff affected the quality of evidence heard at the inquest
Whatever the coroner's verdict today at the inquest into the death of MI6 spy Gareth Williams, many questions will remain unanswered.
Last day of the inquest into the death of Gareth Williams
Experts can't rule out the possibility that the MI6 spy found dead in a bag, locked himself in unaided, before dying.