Whining from Rear Brakes

[riplash]

When my car is cold/been standing overnight I get a whining from my rear brakes while backing off the driveway. Until now it was only happening when I applied the brakes, now it happens when reversing back slowly after releasing the pedal too..

What is it?

 

[Smokey]

Mine did that mate, i just stripped them down and stuck loads of copper grease in and put it back together and all has been fine!

 

[Smokey]

Can you park at night and leave your handbrake off? As this helps too, i think its the cold making them stick that all!