A Mediterranean couple sought in connection with Williams' death is now considered a "red herring" after further police inquiries.
Organisers of the ladies fashion course Williams' enrolled on in secret will give statements to the inquest too.
The lawyer for MI6 says calling corporate witnesses will "paint a picture and set the scene".
Two experts have tried to reconstruct how Mr Williams could have got into the bag and locked it - The coroner says he wants a live demonstration in court.
The issue of whether or not Mr Williams could have got into the bag and padlocked it from the inside "goes to heart" of inquest the coroner says.
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Police are appealing for information about a man who racially abused a 23-year-old woman and then began "throwing punches in her direction".
The conmen, including a former X Factor contestant, were sentenced for the 'heartless' scam, which preyed on vulnerable people.
Police are appealing for information about two sisters aged 12 and five who went missing three days ago.