The London TTA taekwondo club is part of Grandmaster T.K. Loh’s Traditional Taekwondo Association. We train in the Barbican and Moorgate areas of the City of London and near London Bridge in Southwark. The club instructor is Jake Bender, 4th Dan. London sparring course 2015. TTA Team Competition 2015. Leeds Sparring Course – March 21, 2015. Instructor: Jake Bender, 4th Dan. 700 - 8.15pm All grades and beginners. 815 - 9.00pm Intermediate and senior. Golden Lane Leisure Centre. Errol St, EC1Y 8SE.