Is there life north of the Thames? Where is the elusive source of the North Circular? Find out on Saturday's ride, which starts of at 10,00am at the Cutty Sark Gardens, SE10 9HT. First we cross the Greenwich Foot Tunnel and then cycle eastwards along the north bank of the Thames until where we will have a good view of the O2 building. We then break for light refreshments at the Trinity Buoy Wharf before going on to cycle through East India Dock and then take a look at all the urban regeneration taking place at Silvertown. We will also visit the Thames Barrier Park. We then cross on the Woolwich Ferry and cycle back along the Thames Path and through the sandpit to get back to Greenwich.