Indeed they start a little downstream of the Thames Barrier at Woolwich Ferry.
People were talking about them at Southwark Cathedral last weekend having seen one outside.
The Jubilee Greenway is inspired by the Silver Jubilee Walkway so the markers are decorated with a version of the 1977 Jubilee logo. The route leads to and from the Olympic Park where the original Greenway running along the top of a sewage pipe is found.
There is much excitement about new markers in Rotherhithe where the new trail (and Thames Path) at King’s Stairs would be obliterated if Thames Water’s plans for a workstation are approved.