An extremist who tried to flee the country on Eurostar with a passport belonging to someone else has been convicted of terror offences.
Afsor Ali, 27, was found guilty of three out of four counts of possessing terrorist material following a trial at the Old Bailey.
Ali, from Bethnal Green in east London, had earlier admitted possessing someone else's UK passport.
It was recovered after he was detained in March at St Pancras where he was planning to board a train to Paris. Jurors were told that police found extremist material after Ali was arrested in December 2011. He was detained as he took part in a protest against American drone attacks in Pakistan alongside members of the banned group Muslims Against Crusades outside the US embassy.
He was released without charge but during the investigation an MP3 player was seized with a laptop and external hard drive taken from his home during a search.
When they were examined, they were shown to contain documents that were useful to terrorists, the court heard.
When police searched his home months later and they found his new computer also contained extremist material, jurors were told.
During the trial, prosecutor Oliver Glasgow told the court Ali had promoted extremism in YouTube videos under the alias Asad Ullah. In a clip from 2012 he warns the viewer not to attend the wedding of the Duke and Duchess of Cambridge because of a terror attack.
Ali was remanded in custody until his sentencing on Tuesday next week.