The retrial of student protesters Alfie Meadows and Zak King saw Alfie give evidence.
The pair face charges of violent disorder on a December 2010 demonstration. A previous trial ended with a hung jury.
In cross examination the prosecution argued that Alfie had joined an attack on police with a fence. Alfie defended his right to be on the protest and told the court that the reason people lifted up a fence was “ to protect protesters”.
The trial continues.