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Bio: David Birdsall is a qualified sports therapist. As the senior technical coach of Nihon Tai-jitsu GB, which is pending status as governing body for the Nihon tai-jitsu martial art, he teaches self-defence seminars across the United Kingdom. Past experience includes boxing, kick boxing, Wado Ryu karate, and he currently teaches tai-jitsu, ju-jitsu and aiki-jitsu. He has participated in security work at large public venues and conference centres throughout the world for a number of years. This work included venue security, evacuation liaison, front-of-house security, backstage security and personal VIP security at venues.