A young mother of an eight-month-old baby and a 17-year-old youth were among 11 people charged last night over the alleged airliner bomb plot.
Scotland Yard's terror chief also revealed dramatic details of the massive investigation, including confirmation that officers had uncovered bomb-making equipment.
Charges against the 17-year-old male, who cannot be named for legal reasons, alleged he had a book on bombs, suicide notes and the wills of people prepared to commit acts of terror.
The mother, 23-year-old Cossar Ali, from Walthamstow, east London, was charged with failing to disclose information which may have helped prevent her husband allegedly committing terrorism.
He was one of eight charged with conspiracy to murder and a new offence of preparing acts of terrorism, under laws which only came into effect earlier this year.
For the first time, head of the Metropolitan Police anti-terrorist branch Peter Clarke revealed details of the "immense" investigation.
He disclosed that police had seized bomb-making equipment since the arrests on August 10 including chemicals such as hydrogen peroxide, electrical components and documents.
Officers had also recovered a number of martyrdom videos, 400 computers, 200 mobile telephones and 8,000 computer media items such as DVDs and memory sticks.
The eight charged with conspiracy to murder were: n Ahmed Abdullah Ali (25) from Walthamstow; n Tanvir Hussain (25) from Leyton, east London; n Umar Islam (28) from High Wycombe, Buckinghamshire - also known as Brian Young; n Arafat Waheed Khan (25) from Walthamstow; n Assad Ali Sarwar (26) from High Wycombe; n Adam Khatib (19) from Walthamstow; n Ibrahim Savant (25) from Walthamstow; Waheed Zaman (22) from Walthamstow.
The other three charged include the teenager, Cossar Ali and a man, Mehran Hussain.
Lawyers for Cossar Ali - the only woman so far charged - had earlier launched legal moves to challenge the decision to keep her in police custody.
However the case was adjourned after the court was told she had been charged.
She is accused of failing to disclose information which might be of "material assistance" in preventing her husband Ahmed Abdullah Ali - also known as Abdullah Ali Ahmed Khan - from the commission of a terrorist act.
Mehran Hussain was charged with failing to disclose information which might be of "material assistance" in preventing Nabeel Hussain from the commission of a terrorist act. All those charged are expected to appear at City of Westminster Magistrates' Court today.
Scotland Yard has until Wednesday evening to question ten of the other 11 suspects.