Allowing cyclists to move in both directions on streets that remain One Way for motor traffic is not totally new in Wandsworth. Petworth Street (off Battersea Bridge Road) has long permitted it, with clear signage alerting drivers to the possibility of meeting cyclists coming towards them.
In July 2018, the Council decided to do what boroughs like Westminster and Lambeth had already done, often rather extensively. Wandsworth is now trialling (for a limited period of time) contra-flow cycling on four additional streets – Candahar Road in Battersea, Trinity Crescent in Tooting, Furmage Street in Earlsfield, and Temperley Road in Balham. Local residents have already visited these streets and think that the signage has been excellently done (with one exception that is likely to be corrected).
Here is a presentation that sets out in a graphic way the arguments for contra-flow cycling: