You're at the southbound stop for the 33 and 72 buses heading down Rocks Lane towards Roehampton. To join the Barnes Trail, cross Queen Elizabeth Walk and read Oar 1 outside the Red Lion pub, then cross Castelnau into Church Road. Oar 2 is less than 100 metres along on the right hand side, outside the Olympic Cinema. Alternatively, if you want to follow the Trail Extension, you'll see Oar E1 at the corner of Queen Elizabeth Walk introducing the first part of the walk towards the river.