Mandatory Contra-Flow Cycle Lane

Image of Blank Signs   [Traffic Signs⇐]
One-Way for Cars and Two-Way for Pedal Cycles

No Entry
 Except
 Cycles
   Mandatory
Cycle Lane
 
     End of
cycle lane
(Optional)
   Mandatory
Contra-Flow
 Cycle Lane
 
           
        Interesting example. - [zenbikermaniac.blogspot.co.uk]
Pedal Cycles can ignore the No Entry sign and continue on the left.
Cars must stay out of the cycle lane, edged by a continuous white line.
The end of the cycle lane may or may not be marked on the road.
The sign at the other end tells drivers they are in a one-way road
  and warns them to expect oncoming cycles in a protected lane.