Rear wheel squeal

Hi guys,
I'm having problems locating a squeal in the left rear possibly from the brake disc.
I have checked the brake pads and the disc, also checked and regreased the rear axel bearings.
Any ideas would be great

could it be the piston getting stuck ,or maybe the rotor heat shield
is bent and rubbing on the disc?
Maybe jack it up and put it on stands and give it a spin [by hand]

Yeah three-dogs I did try that but to no avail, it only makes noise when it has full contact with the ground. I have not had a look at the hand brake pads yet, hopefully get to check them Saturday. I am a learn by doing kind of person and every bit of info is greatly appreciated thanks

Give both sides and handbrake a decent clean at the car wash.
dont get too bullish as high pressure water can get into very hard to see places causing
all manner of faults so be wary of that eh

Will do threedogs thanks will get back to you on how it goes. The stupid thing is I didn't even think of that.

Could be as simple as a rock stuck in the backing plate. But definitely check the wheel bearing for play when it's off the ground