Damaged street light from private overhanging trees

Owners at Jasmine House, Higher Lane, L9 9AZ like to leave their trees overhanging on to the street, regularly. This problem has happened multiple times before where people can't walk safely on the pavement because of the branches, but now the streetlight has been damaged by their trees. Broken glass directly underneath. Pitch black at night. Unsafe corner. There has been 2 car accidents recently where cars have ploughed into the railway railings opposite. This issue has been like this many many months but I've only just noticed the damage to the streetlight.