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Bomb mix 'began burning in lab' Bomb mix 'began burning in lab'
(10 minutes later)
A sample of explosive charge from the rucksack bomb of one of the alleged 21 July plotters burnt through forensic packaging days later, a jury has heard.A sample of explosive charge from the rucksack bomb of one of the alleged 21 July plotters burnt through forensic packaging days later, a jury has heard.
Explosive experts took samples of the hydrogen peroxide and chapatti flour mixture from the Tube which Ramzi Mohammed allegedly tried to blow up.Explosive experts took samples of the hydrogen peroxide and chapatti flour mixture from the Tube which Ramzi Mohammed allegedly tried to blow up.
But it began smoking and burnt through packaging, Woolwich Crown Court heard.But it began smoking and burnt through packaging, Woolwich Crown Court heard.
Mr Mohammed and five others deny conspiracy to murder and conspiracy to cause explosions in 2005.Mr Mohammed and five others deny conspiracy to murder and conspiracy to cause explosions in 2005.
The other men on trial are Manfo Asiedu, Muktar Ibrahim, Hussein Osman, Yassin Omar, and Adel Yahya.The other men on trial are Manfo Asiedu, Muktar Ibrahim, Hussein Osman, Yassin Omar, and Adel Yahya.
'As powerful as TNT''As powerful as TNT'
Claire McGavigan, a senior case officer at the Forensics Explosives Laboratory in Kent, said that the moment she went into the building where the samples were being stored on 26 July 2005 she could smell burning.Claire McGavigan, a senior case officer at the Forensics Explosives Laboratory in Kent, said that the moment she went into the building where the samples were being stored on 26 July 2005 she could smell burning.
The pale yellow gel-like mixture was being stored in special anti-static bags, placed in water and then in plastic boxes in a separate building to the main laboratory, the court heard.The pale yellow gel-like mixture was being stored in special anti-static bags, placed in water and then in plastic boxes in a separate building to the main laboratory, the court heard.
"I instantly noticed a burning smell," she said."I instantly noticed a burning smell," she said.
It burnt through three layers of packaging and left a hole Claire McGavigan
"I noticed that one of the exhibits had quite a lot of condensation on the inside of the packaging and there was smoke circulating around the inside of the bag.""I noticed that one of the exhibits had quite a lot of condensation on the inside of the packaging and there was smoke circulating around the inside of the bag."
She told the jury that she and the principal forensic investigator then hosed down the outside of the bag.She told the jury that she and the principal forensic investigator then hosed down the outside of the bag.
"Some of the material had burnt and was black and charred. It burnt through three layers of packaging and left a hole," Ms McGavigan said."Some of the material had burnt and was black and charred. It burnt through three layers of packaging and left a hole," Ms McGavigan said.
An explosives officer with the Metropolitan Police, Ian Jones, said tests on the alleged bomb left by Mr Mohammed at Oval station showed it did contain peroxide and had tacks embedded in it.
Mr Jones also helped in recovering the device allegedly abandoned in Little Wormwood Scrubs by Mr Asiedu.
The court has also heard that the explosive charge was as powerful as TNT or Gelignite and could have caused death or serious injury.The court has also heard that the explosive charge was as powerful as TNT or Gelignite and could have caused death or serious injury.