A poster is a good idea. I have made up an A4 template that makes 4 mini leaflets. I will be posting them locally over the next few days as I am sure not enough people know about the forum.
If anyone would like a copy and is willing to print some out and deliver them around their local roads I'd certainly appreciate the help!
Those wishing to write their own letter can do so using the following address:
Planning department
London Borough Of Lewisham
Fifth Floor 1 Laurence House,
Catford Road
SE6 4R