Lewisham Living Streets is a new group looking for people to be involved. It group kicked off at the end of last year and has already sent suggestions for improvements to the council following a visit to a local street in Brockley.
Meetings are normally held 19:30-21:00 on the third week of every two months (Jan, Mar, May, July, Sep, Nov) currently at the 1st Floor Meeting Room, Blythe Hill Tavern, 319 Stanstead Road, London, SE23 1JB. Contact the group for the date of next meeting.
Just so you know, below you're contacting a local volunteer, not the national charity.