You can go under the Green Man roundabout in both directions. On the way in the entrance is on the right by the traffic lights at the junction of Holly Bush Hill and New Wanstead Road.
On the way out it is on the left handside by Hanbury Drive.
High Road Leytonstone is a quieter route in, as most traffic uses the A12. Don't be put off by the A11 and the Bow flyover it is not any worse than any other road.
This is the route I did daily for 3 years.
http://www.gmap-pedometer.com/?r=5707994
You can go under the Green Man roundabout in both directions. On the way in the entrance is on the right by the traffic lights at the junction of Holly Bush Hill and New Wanstead Road.
On the way out it is on the left handside by Hanbury Drive.
High Road Leytonstone is a quieter route in, as most traffic uses the A12. Don't be put off by the A11 and the Bow flyover it is not any worse than any other road.