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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The House of Commons Commission will consider how long the bongs should be halted following concerns raised by a number of MPs.
The chimes are being stopped to allow extensive renovation work to the Elizabeth Tower, the Great Clock and its bell.
Protesters threw bottles and fireworks at police as unrest broke out following the death of Rashan Charles after he was chased by police.