Hassan Qadri from the Muslim Youth League UK has told ITV Calendar that the government has been slow in tackling radicalisation in the UK.
Speaking on the 10th anniversary of the 7/7 London bombings, Mr Qadri urged David Cameron to reach out to the Muslim community to deal with extremism.
ITV Calendar spends a day at Park View Primary Academy in Beeston speaking to those determined that atrocities of 7/7 never happen again.
London was in a celebratory mood on 7 July 2005, but everything changed when three suicide bombers attacked the capital's transport network.
Paul Dadge become the unwitting face of the 7/7 rescue effort after a picture of him helping a woman in the aftermath went around the world.