If you don't crash into the sign or the tree on the cycle lane (while obeying the sign to look both ways) you reach the edge of the two-way road. There you may obey the sign opposite to look left and get hit by a car coming along from your right. Assuming you manage to cross the road in one piece you can follow the cycle lane straight into the bush....
Location: Wandsworth: Junction of Chillerton Road/Birchwood Road and Rectory Lane SW17. 14 Oct 2007
For more see cycling farcilities see
www.warringtoncyclecampaign.co.uk/facility-of-the-month
This photo made the January 08 page of the site and also the Feb/Mar London Cyclist magazine. So the council, goaded into action, 'improved' the facility:
I suppose we should be thankful they didn't cut down the tree. Mind you they could have spent the money trimming the bush on the cycle path you proceed to: