Lee Valley White Water Centre, the venue for watersports during London 2012, offers several boat-based activities including canoeing, kayaking and rafting. Sure, being in Hertforshire, it’s a little outside of London, but it sure beats risking a fall into the murky waters of the Thames. From £49.
Also available is the chance to ride a speedboat down the Thames. You might not ooze the style of David Beckham in the London 2012 opening ceremony, but if you close your eyes (and breath through your mouth), it’s almost the same as banana boating in the Bahamas. The 40 minute ride takes you on a return trip from St Katharine’s Pier to the Thames Barrier. 35mph may not seem fast on land, but it’s a heck of a lot faster when you’re low to the water. From £39.95 per adult.