Britain's youngest female terror plotter has been found guilty of preparing an attack on London with the first all-woman Islamic State cell.
Safaa Boular, now 18, secretly discussed the murderous scheme with her sister and mother using coded language which had an Alice in Wonderland tea party theme.
Boular first began planning a grenade and gun attack on the British Museum when she was thwarted from joining her IS husband in Syria.
She passed the baton to her sibling after she was arrested and remanded in custody for trying to travel to the war zone.
Following an Old Bailey trial, she was found guilty of preparing acts of terrorism abroad and in the UK.
Boular made no reaction in the dock as she was found guilty on Monday by a jury after two days of deliberations.
Judge Mark Dennis QC put off sentencing for around six weeks for a report to be compiled.
Boular is the youngest female to be charged with planning an IS attack in the UK.
Her sister Rizlaine, 22, has already admitted planning a knife attack in London and their mother Mina Dich, 44, has pleaded guilty to assisting her.
Metropolitan Police's Deputy Assistant Commissioner Dean Haydon said: "This investigation started with Safaa, and her attempts to travel out to Syria, marry a Daesh fighter and support their terrorist activity. Having been prevented from travelling to Syria, she then set about plotting an attack in the UK but her plans were being covered by the counter terrorism network and security services.
"After Safaa was arrested and charged, her mother and sister tried to pick up where she left off. But again, working with the security services, we tracked their plans and stopped them before they were able to put them into practice.
"All three women were filled with hate and toxic ideology and were determined to carry out a terrorist attack. Had they been successful, it could well have resulted in people being killed or seriously injured."