Stockport Council are only responsible for maintaining temporary traffic lights.
If the lights are permanent you will need to report the details to Greater Manchester Urban Traffic Control (GMUTC.)
GMUTC are responsible for the control and maintenance of the traffic signal network in Greater Manchester.
Their contact details are:
General Office: 0161 247 3175
Fault Control Room: 0845 600 1220
General fax: 0161 228 1530