BBC "took terrorist trainers paintballing" according to the Times.
Bear in mind that the trial is still continuing. Innocent until proven guilty, and all that. In any case the most damaging aspect of this story to the BBC is not the paintballing. The worst that happened there is that they were fooled. No, the most shocking thing is this:

Nasreen Suleaman, a researcher on the programme, told the court that Mr Hamid, 50, contacted her after the July 2005 attack and told her of his association with the bombers. But she said that she felt no obligation to contact the police with this information. Ms Suleaman said that she informed senior BBC managers but was not told to contact the police.