Paul Powers (back/centre) already has six world kickboxing champions at his Sheffield club A father and son are among a team of nine kickboxers who will compete in an international competition in Spain. Wayne Bird, 52, and his son Luke, 20, will join fighters of Powers Martial Arts in Sheffield when they head to the ISKA World Championships in Madrid in November. Due to the amateur nature of the competition the team need to raise about £14,000 to pay for their trip.