Photographs of shrapnel used in the bomb planted on a packed Tube train at Parsons Green station in September 2017 have been released by the Metropolitan Police.
The images, which show metal nuts, bolts, screws and socket heads as well as knives and screwdrivers recovered from the scene of the attack on September 15, were shown to the jury in the trial of the teenager accused of planting the device on Friday (March 9).
Many of the objects show burn damage, but the device did not fully detonate. Had it detonated, the objects would have been flung out at high speed and caused serious damage, an expert witness told the Old Bailey.
Ahmed Hassan Ali, 18, of Cavendish Road, Sunbury, denies charges of attempted murder and causing an explosion. His trial entered its third day on Friday.
Sarah Wilson, from the Forensic Explosives Laboratory, estimated around 2.2kg of shrapnel had been placed in a plastic bucket along with a tupperware box and a glass vase containing a total of 400g of TATP - a highly unstable explosive.
Ms Wilson told the court on Friday: "Initiation of several hundred grams of TATP has a potential to cause extensive damage to property and serious harm to persons in close proximity, which could be fatal.
"The addition of shrapnel would have increased the potential for harm."
Although there were no deaths, the device caused a "fireball" in the Tube carriage, injuring 29 people.
Mr Hassan was arrested at Dover the next day, September 16, and admitted to police officers that he had made the device.
A search of his home found traces of TATP and objects similar to those used in building the bomb.
The trial continues.
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