Ali, 28, of Walthamstow, eastLondon; Sarwar, 29, ofHighWycombe; and Hussain, 28, of Leyton, east London, were among eightdefendants at the six-monthtrial at Woolwichcrown court.
WoolwichCrownCourt heard that Iqbal, of Bishopscote Road, Arshad, Hussain and Ahmed downloaded computer files containing practical instruction for an attack.