If you need information on how to lobby for improvements to cycling facilities, there are a number of organisations you might consider approaching.
The first place to try is Bricycles, a Brighton-and-Hove based community group that aims to make cycling easier, safer and more attractive in Brighton, Hove and Sussex. For more info go to http://bricycles.org.uk/.
For the Lewes area there is Cycle Lewes: http://www.cyclelewes.org.uk/
You may want to check what our local authorities are doing to promote cycling.
Brighton and Hove:
http://www.brighton-hove.gov.uk/content/parking-and-travel/travel-transport-and-road-safety/cycling
East Sussex:
http://www.eastsussex.gov.uk/leisureandtourism/countryside/cycling/default.htm
West Sussex:
https://www.westsussex.gov.uk/leisure-recreation-and-community/walking-horseriding-and-cycling-routes
East Sussex also has a Local Access Forum:
http://www.eastsussex.gov.uk/leisureandtourism/countryside/rightsofway/localaccessforum/download1.htm