One of the 21 July bomb plot suspects may have saved a tower block of people from being blown up, a court was told.
Manfo Asiedu is accused of involvement in the July 21 plot
Woolwich Crown Court heard that Manfo Asiedu, 34, dismantled a booby-trapped sideboard at a London "bomb factory".
His defence barrister, Stephen Kamlish QC, said in doing so he was possibly responsible for "saving the block and all the people in it".
Six men deny conspiracy to murder and to cause explosions across London's transport network on 21 July 2005.
It is alleged that Mr Asiedu was the fifth bomber but lost his nerve.
His barrister was opening the case for the defence for Mr Asiedu, who had turned on co-defendant Muktar Said Ibrahim two months into the trial and accused him of planning an attack "bigger and better" than 7 July's attack on the London Underground.
Mr Kamlish said of Mr Asiedu: "He's not asking for any applause, but if he hadn't have done it and it was a bomb that actually worked... he was in fact responsible - potentially - for saving the block and all the people in it."
'Used and abused'
Mr Kamlish said his client - who the jury was told was really called Sumailia Abubakhari - was "used and abused" by Mr Ibrahim who was a "cowardly, manipulative schemer".
The barrister also said that until recently, Mr Ibrahim and co-defendant Yassin Omar's "influence" had stopped him "from giving the game away".
The barrister added that there was "simply no evidence" of Mr Asiedu being a fanatic and that "being a fanatic is a basic minimum requirement for being a suicide bomber".
The six accused are Mr Muktar Said Ibrahim, 29, of Stoke Newington, north London; Mr Ramzi Mohammed, 25; Mr Yassin Omar, 26, of New Southgate, north London; Mr Manfo Kwaku Asiedu, and Mr Hussein Osman 28, both of no fixed address; and Adel Yahya, 24, of Tottenham, north London.
The trial continues.