Damon Smith, 20, planted a ball bearing bomb on a Tube train after taking pictures of himself next to the mastermind behind the 2015 Paris terror attacks, the court heard.

The student is alleged to have left the explosive device on a Jubilee Line carriage at North Greenwich station on October 20 - before heading off to his morning lecture.

In his trial at the Old Bailey on Wednesday, it emerged that two members of the public spotted the explosive-filled rucksack and alerted the driver at North Greenwich station.

But the driver thought it was lost property and took it with him into his cab but when he looked inside was horrified to see wires protruding from the back of the clock.