Martin Weaver was one of the specialists working with the bereaved, survivors and first responders following the 7/7 bombings.
He was part of a team providing psychological support, psychotherapy and counselling.
Martin has since set up a programme for dealing with traumas, like that of 7 July 2005.
In an interview with ITV News London, he describes his role on that day eight years ago - and how he's been working with survivors since.
"Can anything positive arise out of such terrible events? We are of the view that new skills and practices can be learned that will endure and protect us far into the future. These skills can help us to develop resilience and feel safe and secure in a world that we are constantly told is ever more dangerous. This is the concept at the heart of Trauma Resilience Training.Through our own clinical work and research from both Combat and Police psycho-physiological studies, we have developed a training programme that is a combination of education, Advance Imagery Training for the future event and Psychological tools to help prevent psychological distress following an incident. Our programme makes a significant shift from ‘retrospective care’ to ‘future resilience’ and is endorsed by the British Association for Counselling & Psychotherapy. "