Classes are held at the Tokei Martial art centre (http://www.tokeicentre.org/index.shtml) on Wednesdays from 17.50 to 19.00The centre is closest to London bridge tube station, just walk down Tooley street until you reach a Costcutters shop on the right, turn right and follow the road around to the left. The centre is slightly raised above street level and has changing rooms, showers even a gym.Please pay 7 at the reception when you enter.