Rob I found this out the hard way too.
The island at the bottom of my road, you might be familiar with it. The one the South Circ drunk and speeders choose to hit once or twice a year.

Both islands, the one on CR and the other on Waldram, neither were working, none of the lighting etc. This was like this into the winter, so fearing an accident I contacted Lewisham.

Shocked with the response to say the least.

Something along the lines of...

If its the island on CR, we will take a look, the same for the street lights, but if its the ones on the South Circ, thats TfL ! They are 20ft apart and identical.
But they were not interested in helping prevent an accident.

Took almost 2 months in the end, then all at once, the whole lot was done.
That was a nasty patch for a while though!

Its disgusting that locals have no access to an accurate WHO TO CALL list.
When 6 CR started to collapse I called the town hall emergency line......... im STILL waiting for them to call me back 9 months later.

999, and it was all solved in seconds, well done to the boys in blue once again. But horrified to have to do that.