A lawyer for the police said he was worried about "sensationalising" the inquest with a live demonstration of the bag and offers a video clip by an expert as alternative.
Police reveal "problems in the DNA analysis" of mixed profile found on Williams' hand - found the contamination was from scientist at scene.
The error was spotted by a scientist who's evidence helped convict the killers of Stephen Lawrence in January. The coroner wants to hear from her.
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Police have released CCTV images of a man seen close to the scene of one of the attacks.
A 20-year-old man who died in a triple stabbing outside Parsons Green Tube station has been named by police.
David Jones was responding to London's Fire Commissioner who said the term 'fireman' was outdated and should stop being used.