A former government scientist has called into question the work of the prosecution's key expert witness in the case of the 21/7 bombers.
Sean Doyle, used to be the principal scientist at the government's Forensic Explosives Laboratory (FEL).
In a witness statement, Mr Doyle said a number of FEL scientists "openly expressed concerns" relating to the work of Dr Black.
The methodology employed by Dr Black and the interpretation of the results may not be reliable.
In my opinion, the scientific evidence presented by Dr Black was not treated with the caution required of a novel forensic technique.
More top news
England manager Sam Allardyce says it was an easy decision to keep Wayne Rooney on as captain.
Four-year-olds Rosie and Ruby Formosa were conjoined at birth and given a slim chance of survival.
Thomas Jackson died a week after being stabbed as he tried to save fellow Brit Mia Ayliffe-Chung as she was attacked in Australia.