Football may be hogging the limelight, but the Canoe Slalom World Cup is tearing its way towards us…and it's happening right here in London. An extreme sport that relies on split-second reactions, and some serious levels of fitness, each run is an adrenalin-fuelled race of speed and skill. Today is chock-full of heats for the races over the weekend – witness the best canoeists in the world tackle the tides and dodge obstacles in the greatest slalom event of the year. General admission. Free entry for under 5s. Event ends 7pm.