Dabeer Hussain and Waris Ali, now both 18 and from the Ravensthorpe area of Dewsbury are accused of possessing a terrorism manual called the Anarchists Cookbook on their computers and of discussing a plan to spy on and blow up a building connected to the far right politicals group, British National Party, the jury at heard.

Ali, of Dearnley Street, Ravensthorpe, Dewsbury is also accused of downloading a copy of the Proper Anarchists Cookbook onto his computer and possessing small amounts of potassium nitrate and calcium chloride, the court heard.

Both chemicals can be used in the preparation of a bomb, the court heard.

At the time of the offences between May 2006 and September 2007 Ali was still 15, and Hussain of Clarkson Street, Ravensthorpe was just 16.

At the beginning of the pair's trial at Leeds Crown Court on Monday the jury of seven women and five men were officially sworn in.

Judge John Milford QC lifted reporting restrictions allowing the pair to be named despite the age of the teenagers at the time of the alleged offences.

Both teenagers are currently on bail.

Proceeding