I had trouble with that crossing a few months ago: it appeared to be working but it never changed to the green man. Fortunately it was a Sunday so traffic wasn't too heavy but I'd hate to try crossing there at any other time.

You can also report street faults online via a TfL webpage, although it's not as handy as a telephone number when you're out and about. They will work out whether the fault is TfL's responsibility or the local authority's, and will notify the appropriate people.

Or you can report faults via Lewisham's webpage - very handy for reporting faulty street lights.