Royler Gracie black belt DAVID ADIV who is head instructor of the RGDA will be holding a two-day workshop in London, England on Friday April 20th and Saturday April 21st, it will be held at the RGDA-UK European headquarters.Clapton KO Gym152 Lower Clapton RoadClaptonLondon E5 0QI Phone: 020 8525 4555Mobile: 07960 932 224By NR Over ground: Hackney Central & Hackney Downs & ClaptonBy Bus: 38, 48, 55, 106, 253 & 254 Workshop will consist of} Brazilian jiu jitsu / Submission Wrestling David Adiv is one of Royler Gracie